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Eliminate the conditionally-compiled fallback functions for htonl etc.
[perl5.git] / util.c
CommitLineData
a0d0e21e 1/* util.c
a687059c 2 *
1129b882
NC
3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 * 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
a687059c 5 *
d48672a2
LW
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8d063cd8 8 *
8d063cd8 9 */
a0d0e21e
LW
10
11/*
4ac71550
TC
12 * 'Very useful, no doubt, that was to Saruman; yet it seems that he was
13 * not content.' --Gandalf to Pippin
14 *
cdad3b53 15 * [p.598 of _The Lord of the Rings_, III/xi: "The Palantír"]
a0d0e21e 16 */
8d063cd8 17
166f8a29
DM
18/* This file contains assorted utility routines.
19 * Which is a polite way of saying any stuff that people couldn't think of
20 * a better place for. Amongst other things, it includes the warning and
21 * dieing stuff, plus wrappers for malloc code.
22 */
23
8d063cd8 24#include "EXTERN.h"
864dbfa3 25#define PERL_IN_UTIL_C
8d063cd8 26#include "perl.h"
7dc86639 27#include "reentr.h"
62b28dd9 28
6f408c34 29#ifdef USE_PERLIO
2e0cfa16 30#include "perliol.h" /* For PerlIOUnix_refcnt */
6f408c34 31#endif
2e0cfa16 32
64ca3a65 33#ifndef PERL_MICRO
a687059c 34#include <signal.h>
36477c24
PP
35#ifndef SIG_ERR
36# define SIG_ERR ((Sighandler_t) -1)
37#endif
64ca3a65 38#endif
36477c24 39
172d2248
OS
40#ifdef __Lynx__
41/* Missing protos on LynxOS */
42int putenv(char *);
43#endif
44
868439a2
JH
45#ifdef HAS_SELECT
46# ifdef I_SYS_SELECT
47# include <sys/select.h>
48# endif
49#endif
50
8d063cd8 51#define FLUSH
8d063cd8 52
16cebae2
GS
53#if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
54# define FD_CLOEXEC 1 /* NeXT needs this */
55#endif
56
a687059c
LW
57/* NOTE: Do not call the next three routines directly. Use the macros
58 * in handy.h, so that we can easily redefine everything to do tracking of
59 * allocated hunks back to the original New to track down any memory leaks.
20cec16a 60 * XXX This advice seems to be widely ignored :-( --AD August 1996.
a687059c
LW
61 */
62
79a92154 63#if defined (DEBUGGING) || defined(PERL_IMPLICIT_SYS) || defined (PERL_TRACK_MEMPOOL)
1f4d2d4e
NC
64# define ALWAYS_NEED_THX
65#endif
66
26fa51c3
AMS
67/* paranoid version of system's malloc() */
68
bd4080b3 69Malloc_t
4f63d024 70Perl_safesysmalloc(MEM_SIZE size)
8d063cd8 71{
1f4d2d4e 72#ifdef ALWAYS_NEED_THX
54aff467 73 dTHX;
0cb20dae 74#endif
bd4080b3 75 Malloc_t ptr;
55497cff 76#ifdef HAS_64K_LIMIT
62b28dd9 77 if (size > 0xffff) {
bf49b057 78 PerlIO_printf(Perl_error_log,
16cebae2 79 "Allocation too large: %lx\n", size) FLUSH;
54aff467 80 my_exit(1);
62b28dd9 81 }
55497cff 82#endif /* HAS_64K_LIMIT */
e8dda941
JD
83#ifdef PERL_TRACK_MEMPOOL
84 size += sTHX;
85#endif
34de22dd 86#ifdef DEBUGGING
03c5309f 87 if ((SSize_t)size < 0)
5637ef5b 88 Perl_croak_nocontext("panic: malloc, size=%"UVuf, (UV) size);
34de22dd 89#endif
12ae5dfc 90 ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
da927450 91 PERL_ALLOC_CHECK(ptr);
bd61b366 92 if (ptr != NULL) {
e8dda941 93#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC
94 struct perl_memory_debug_header *const header
95 = (struct perl_memory_debug_header *)ptr;
9a083ecf
NC
96#endif
97
98#ifdef PERL_POISON
7e337ee0 99 PoisonNew(((char *)ptr), size, char);
9a083ecf 100#endif
7cb608b5 101
9a083ecf 102#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC
103 header->interpreter = aTHX;
104 /* Link us into the list. */
105 header->prev = &PL_memory_debug_header;
106 header->next = PL_memory_debug_header.next;
107 PL_memory_debug_header.next = header;
108 header->next->prev = header;
cd1541b2 109# ifdef PERL_POISON
7cb608b5 110 header->size = size;
cd1541b2 111# endif
e8dda941
JD
112 ptr = (Malloc_t)((char*)ptr+sTHX);
113#endif
5dfff8f3 114 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
8d063cd8 115 return ptr;
e8dda941 116}
8d063cd8 117 else {
1f4d2d4e 118#ifndef ALWAYS_NEED_THX
0cb20dae
NC
119 dTHX;
120#endif
121 if (PL_nomemok)
122 return NULL;
123 else {
4cbe3a7d 124 croak_no_mem();
0cb20dae 125 }
8d063cd8
LW
126 }
127 /*NOTREACHED*/
128}
129
f2517201 130/* paranoid version of system's realloc() */
8d063cd8 131
bd4080b3 132Malloc_t
4f63d024 133Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
8d063cd8 134{
1f4d2d4e 135#ifdef ALWAYS_NEED_THX
54aff467 136 dTHX;
0cb20dae 137#endif
bd4080b3 138 Malloc_t ptr;
9a34ef1d 139#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
6ad3d225 140 Malloc_t PerlMem_realloc();
ecfc5424 141#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
8d063cd8 142
a1d180c4 143#ifdef HAS_64K_LIMIT
5f05dabc 144 if (size > 0xffff) {
bf49b057 145 PerlIO_printf(Perl_error_log,
5f05dabc 146 "Reallocation too large: %lx\n", size) FLUSH;
54aff467 147 my_exit(1);
5f05dabc 148 }
55497cff 149#endif /* HAS_64K_LIMIT */
7614df0c 150 if (!size) {
f2517201 151 safesysfree(where);
7614df0c
JD
152 return NULL;
153 }
154
378cc40b 155 if (!where)
f2517201 156 return safesysmalloc(size);
e8dda941
JD
157#ifdef PERL_TRACK_MEMPOOL
158 where = (Malloc_t)((char*)where-sTHX);
159 size += sTHX;
7cb608b5
NC
160 {
161 struct perl_memory_debug_header *const header
162 = (struct perl_memory_debug_header *)where;
163
164 if (header->interpreter != aTHX) {
5637ef5b
NC
165 Perl_croak_nocontext("panic: realloc from wrong pool, %p!=%p",
166 header->interpreter, aTHX);
7cb608b5
NC
167 }
168 assert(header->next->prev == header);
169 assert(header->prev->next == header);
cd1541b2 170# ifdef PERL_POISON
7cb608b5
NC
171 if (header->size > size) {
172 const MEM_SIZE freed_up = header->size - size;
173 char *start_of_freed = ((char *)where) + size;
7e337ee0 174 PoisonFree(start_of_freed, freed_up, char);
7cb608b5
NC
175 }
176 header->size = size;
cd1541b2 177# endif
7cb608b5 178 }
e8dda941 179#endif
34de22dd 180#ifdef DEBUGGING
03c5309f 181 if ((SSize_t)size < 0)
5637ef5b 182 Perl_croak_nocontext("panic: realloc, size=%"UVuf, (UV)size);
34de22dd 183#endif
12ae5dfc 184 ptr = (Malloc_t)PerlMem_realloc(where,size);
da927450 185 PERL_ALLOC_CHECK(ptr);
a1d180c4 186
4fd0a9b8
NC
187 /* MUST do this fixup first, before doing ANYTHING else, as anything else
188 might allocate memory/free/move memory, and until we do the fixup, it
189 may well be chasing (and writing to) free memory. */
e8dda941 190#ifdef PERL_TRACK_MEMPOOL
4fd0a9b8 191 if (ptr != NULL) {
7cb608b5
NC
192 struct perl_memory_debug_header *const header
193 = (struct perl_memory_debug_header *)ptr;
194
9a083ecf
NC
195# ifdef PERL_POISON
196 if (header->size < size) {
197 const MEM_SIZE fresh = size - header->size;
198 char *start_of_fresh = ((char *)ptr) + size;
7e337ee0 199 PoisonNew(start_of_fresh, fresh, char);
9a083ecf
NC
200 }
201# endif
202
7cb608b5
NC
203 header->next->prev = header;
204 header->prev->next = header;
205
e8dda941 206 ptr = (Malloc_t)((char*)ptr+sTHX);
4fd0a9b8 207 }
e8dda941 208#endif
4fd0a9b8
NC
209
210 /* In particular, must do that fixup above before logging anything via
211 *printf(), as it can reallocate memory, which can cause SEGVs. */
212
213 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
214 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
215
216
217 if (ptr != NULL) {
8d063cd8 218 return ptr;
e8dda941 219 }
8d063cd8 220 else {
1f4d2d4e 221#ifndef ALWAYS_NEED_THX
0cb20dae
NC
222 dTHX;
223#endif
224 if (PL_nomemok)
225 return NULL;
226 else {
4cbe3a7d 227 croak_no_mem();
0cb20dae 228 }
8d063cd8
LW
229 }
230 /*NOTREACHED*/
231}
232
f2517201 233/* safe version of system's free() */
8d063cd8 234
54310121 235Free_t
4f63d024 236Perl_safesysfree(Malloc_t where)
8d063cd8 237{
79a92154 238#ifdef ALWAYS_NEED_THX
54aff467 239 dTHX;
97aff369
JH
240#else
241 dVAR;
155aba94 242#endif
97835f67 243 DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
378cc40b 244 if (where) {
e8dda941
JD
245#ifdef PERL_TRACK_MEMPOOL
246 where = (Malloc_t)((char*)where-sTHX);
cd1541b2 247 {
7cb608b5
NC
248 struct perl_memory_debug_header *const header
249 = (struct perl_memory_debug_header *)where;
250
251 if (header->interpreter != aTHX) {
5637ef5b
NC
252 Perl_croak_nocontext("panic: free from wrong pool, %p!=%p",
253 header->interpreter, aTHX);
7cb608b5
NC
254 }
255 if (!header->prev) {
cd1541b2
NC
256 Perl_croak_nocontext("panic: duplicate free");
257 }
5637ef5b
NC
258 if (!(header->next))
259 Perl_croak_nocontext("panic: bad free, header->next==NULL");
260 if (header->next->prev != header || header->prev->next != header) {
261 Perl_croak_nocontext("panic: bad free, ->next->prev=%p, "
262 "header=%p, ->prev->next=%p",
263 header->next->prev, header,
264 header->prev->next);
cd1541b2 265 }
7cb608b5
NC
266 /* Unlink us from the chain. */
267 header->next->prev = header->prev;
268 header->prev->next = header->next;
269# ifdef PERL_POISON
7e337ee0 270 PoisonNew(where, header->size, char);
cd1541b2 271# endif
7cb608b5
NC
272 /* Trigger the duplicate free warning. */
273 header->next = NULL;
274 }
e8dda941 275#endif
6ad3d225 276 PerlMem_free(where);
378cc40b 277 }
8d063cd8
LW
278}
279
f2517201 280/* safe version of system's calloc() */
1050c9ca 281
bd4080b3 282Malloc_t
4f63d024 283Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
1050c9ca 284{
1f4d2d4e 285#ifdef ALWAYS_NEED_THX
54aff467 286 dTHX;
0cb20dae 287#endif
bd4080b3 288 Malloc_t ptr;
4b1123b9 289#if defined(PERL_TRACK_MEMPOOL) || defined(HAS_64K_LIMIT) || defined(DEBUGGING)
ad7244db 290 MEM_SIZE total_size = 0;
4b1123b9 291#endif
1050c9ca 292
ad7244db 293 /* Even though calloc() for zero bytes is strange, be robust. */
4b1123b9
NC
294 if (size && (count <= MEM_SIZE_MAX / size)) {
295#if defined(PERL_TRACK_MEMPOOL) || defined(HAS_64K_LIMIT) || defined(DEBUGGING)
ad7244db 296 total_size = size * count;
4b1123b9
NC
297#endif
298 }
ad7244db 299 else
43387ee1 300 Perl_croak_memory_wrap();
ad7244db 301#ifdef PERL_TRACK_MEMPOOL
19a94d75 302 if (sTHX <= MEM_SIZE_MAX - (MEM_SIZE)total_size)
ad7244db
JH
303 total_size += sTHX;
304 else
43387ee1 305 Perl_croak_memory_wrap();
ad7244db 306#endif
55497cff 307#ifdef HAS_64K_LIMIT
e1a95402 308 if (total_size > 0xffff) {
bf49b057 309 PerlIO_printf(Perl_error_log,
e1a95402 310 "Allocation too large: %lx\n", total_size) FLUSH;
54aff467 311 my_exit(1);
5f05dabc 312 }
55497cff 313#endif /* HAS_64K_LIMIT */
1050c9ca 314#ifdef DEBUGGING
03c5309f 315 if ((SSize_t)size < 0 || (SSize_t)count < 0)
5637ef5b
NC
316 Perl_croak_nocontext("panic: calloc, size=%"UVuf", count=%"UVuf,
317 (UV)size, (UV)count);
1050c9ca 318#endif
e8dda941 319#ifdef PERL_TRACK_MEMPOOL
e1a95402
NC
320 /* Have to use malloc() because we've added some space for our tracking
321 header. */
ad7244db
JH
322 /* malloc(0) is non-portable. */
323 ptr = (Malloc_t)PerlMem_malloc(total_size ? total_size : 1);
e1a95402
NC
324#else
325 /* Use calloc() because it might save a memset() if the memory is fresh
326 and clean from the OS. */
ad7244db
JH
327 if (count && size)
328 ptr = (Malloc_t)PerlMem_calloc(count, size);
329 else /* calloc(0) is non-portable. */
330 ptr = (Malloc_t)PerlMem_calloc(count ? count : 1, size ? size : 1);
e8dda941 331#endif
da927450 332 PERL_ALLOC_CHECK(ptr);
e1a95402 333 DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)total_size));
bd61b366 334 if (ptr != NULL) {
e8dda941 335#ifdef PERL_TRACK_MEMPOOL
7cb608b5
NC
336 {
337 struct perl_memory_debug_header *const header
338 = (struct perl_memory_debug_header *)ptr;
339
e1a95402 340 memset((void*)ptr, 0, total_size);
7cb608b5
NC
341 header->interpreter = aTHX;
342 /* Link us into the list. */
343 header->prev = &PL_memory_debug_header;
344 header->next = PL_memory_debug_header.next;
345 PL_memory_debug_header.next = header;
346 header->next->prev = header;
cd1541b2 347# ifdef PERL_POISON
e1a95402 348 header->size = total_size;
cd1541b2 349# endif
7cb608b5
NC
350 ptr = (Malloc_t)((char*)ptr+sTHX);
351 }
e8dda941 352#endif
1050c9ca
PP
353 return ptr;
354 }
0cb20dae 355 else {
1f4d2d4e 356#ifndef ALWAYS_NEED_THX
0cb20dae
NC
357 dTHX;
358#endif
359 if (PL_nomemok)
360 return NULL;
4cbe3a7d 361 croak_no_mem();
0cb20dae 362 }
1050c9ca
PP
363}
364
cae6d0e5
GS
365/* These must be defined when not using Perl's malloc for binary
366 * compatibility */
367
368#ifndef MYMALLOC
369
370Malloc_t Perl_malloc (MEM_SIZE nbytes)
371{
372 dTHXs;
077a72a9 373 return (Malloc_t)PerlMem_malloc(nbytes);
cae6d0e5
GS
374}
375
376Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
377{
378 dTHXs;
077a72a9 379 return (Malloc_t)PerlMem_calloc(elements, size);
cae6d0e5
GS
380}
381
382Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
383{
384 dTHXs;
077a72a9 385 return (Malloc_t)PerlMem_realloc(where, nbytes);
cae6d0e5
GS
386}
387
388Free_t Perl_mfree (Malloc_t where)
389{
390 dTHXs;
391 PerlMem_free(where);
392}
393
394#endif
395
8d063cd8
LW
396/* copy a string up to some (non-backslashed) delimiter, if any */
397
398char *
5aaab254 399Perl_delimcpy(char *to, const char *toend, const char *from, const char *fromend, int delim, I32 *retlen)
8d063cd8 400{
eb578fdb 401 I32 tolen;
35da51f7 402
7918f24d
NC
403 PERL_ARGS_ASSERT_DELIMCPY;
404
fc36a67e 405 for (tolen = 0; from < fromend; from++, tolen++) {
378cc40b 406 if (*from == '\\') {
35da51f7 407 if (from[1] != delim) {
fc36a67e
PP
408 if (to < toend)
409 *to++ = *from;
410 tolen++;
fc36a67e 411 }
35da51f7 412 from++;
378cc40b 413 }
bedebaa5 414 else if (*from == delim)
8d063cd8 415 break;
fc36a67e
PP
416 if (to < toend)
417 *to++ = *from;
8d063cd8 418 }
bedebaa5
CS
419 if (to < toend)
420 *to = '\0';
fc36a67e 421 *retlen = tolen;
73d840c0 422 return (char *)from;
8d063cd8
LW
423}
424
425/* return ptr to little string in big string, NULL if not found */
378cc40b 426/* This routine was donated by Corey Satten. */
8d063cd8
LW
427
428char *
5aaab254 429Perl_instr(const char *big, const char *little)
378cc40b 430{
378cc40b 431
7918f24d
NC
432 PERL_ARGS_ASSERT_INSTR;
433
5d1d68e2 434 /* libc prior to 4.6.27 did not work properly on a NULL 'little' */
a687059c 435 if (!little)
08105a92 436 return (char*)big;
5d1d68e2 437 return strstr((char*)big, (char*)little);
378cc40b 438}
8d063cd8 439
e057d092
KW
440/* same as instr but allow embedded nulls. The end pointers point to 1 beyond
441 * the final character desired to be checked */
a687059c
LW
442
443char *
04c9e624 444Perl_ninstr(const char *big, const char *bigend, const char *little, const char *lend)
8d063cd8 445{
7918f24d 446 PERL_ARGS_ASSERT_NINSTR;
4c8626be
GA
447 if (little >= lend)
448 return (char*)big;
449 {
8ba22ff4 450 const char first = *little;
4c8626be 451 const char *s, *x;
8ba22ff4 452 bigend -= lend - little++;
4c8626be
GA
453 OUTER:
454 while (big <= bigend) {
b0ca24ee
JH
455 if (*big++ == first) {
456 for (x=big,s=little; s < lend; x++,s++) {
457 if (*s != *x)
458 goto OUTER;
459 }
460 return (char*)(big-1);
4c8626be 461 }
4c8626be 462 }
378cc40b 463 }
bd61b366 464 return NULL;
a687059c
LW
465}
466
467/* reverse of the above--find last substring */
468
469char *
5aaab254 470Perl_rninstr(const char *big, const char *bigend, const char *little, const char *lend)
a687059c 471{
eb578fdb
KW
472 const char *bigbeg;
473 const I32 first = *little;
474 const char * const littleend = lend;
a687059c 475
7918f24d
NC
476 PERL_ARGS_ASSERT_RNINSTR;
477
260d78c9 478 if (little >= littleend)
08105a92 479 return (char*)bigend;
a687059c
LW
480 bigbeg = big;
481 big = bigend - (littleend - little++);
482 while (big >= bigbeg) {
eb578fdb 483 const char *s, *x;
a687059c
LW
484 if (*big-- != first)
485 continue;
486 for (x=big+2,s=little; s < littleend; /**/ ) {
4fc877ac 487 if (*s != *x)
a687059c 488 break;
4fc877ac
AL
489 else {
490 x++;
491 s++;
a687059c
LW
492 }
493 }
494 if (s >= littleend)
08105a92 495 return (char*)(big+1);
378cc40b 496 }
bd61b366 497 return NULL;
378cc40b 498}
a687059c 499
cf93c79d
IZ
500/* As a space optimization, we do not compile tables for strings of length
501 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
502 special-cased in fbm_instr().
503
504 If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
505
954c1994 506/*
ccfc67b7
JH
507=head1 Miscellaneous Functions
508
954c1994
GS
509=for apidoc fbm_compile
510
511Analyses the string in order to make fast searches on it using fbm_instr()
512-- the Boyer-Moore algorithm.
513
514=cut
515*/
516
378cc40b 517void
7506f9c3 518Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
378cc40b 519{
97aff369 520 dVAR;
eb578fdb 521 const U8 *s;
ea725ce6 522 STRLEN i;
0b71040e 523 STRLEN len;
ea725ce6 524 STRLEN rarest = 0;
79072805 525 U32 frequency = 256;
2bda37ba 526 MAGIC *mg;
79072805 527
7918f24d
NC
528 PERL_ARGS_ASSERT_FBM_COMPILE;
529
42bb8ff7 530 if (isGV_with_GP(sv))
4265b45d
NC
531 return;
532
9402563a
NC
533 if (SvVALID(sv))
534 return;
535
c517dc2b 536 if (flags & FBMcf_TAIL) {
890ce7af 537 MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
396482e1 538 sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */
c517dc2b
JH
539 if (mg && mg->mg_len >= 0)
540 mg->mg_len++;
541 }
9cbe880b 542 s = (U8*)SvPV_force_mutable(sv, len);
d1be9408 543 if (len == 0) /* TAIL might be on a zero-length string. */
cf93c79d 544 return;
c13a5c80 545 SvUPGRADE(sv, SVt_PVMG);
78d0cf80 546 SvIOK_off(sv);
8eeaf79a
NC
547 SvNOK_off(sv);
548 SvVALID_on(sv);
2bda37ba
NC
549
550 /* "deep magic", the comment used to add. The use of MAGIC itself isn't
551 really. MAGIC was originally added in 79072805bf63abe5 (perl 5.0 alpha 2)
552 to call SvVALID_off() if the scalar was assigned to.
553
554 The comment itself (and "deeper magic" below) date back to
555 378cc40b38293ffc (perl 2.0). "deep magic" was an annotation on
556 str->str_pok |= 2;
557 where the magic (presumably) was that the scalar had a BM table hidden
558 inside itself.
559
560 As MAGIC is always present on BMs [in Perl 5 :-)], we can use it to store
561 the table instead of the previous (somewhat hacky) approach of co-opting
562 the string buffer and storing it after the string. */
563
564 assert(!mg_find(sv, PERL_MAGIC_bm));
565 mg = sv_magicext(sv, NULL, PERL_MAGIC_bm, &PL_vtbl_bm, NULL, 0);
566 assert(mg);
567
02128f11 568 if (len > 2) {
21aeb718
NC
569 /* Shorter strings are special-cased in Perl_fbm_instr(), and don't use
570 the BM table. */
66a1b24b 571 const U8 mlen = (len>255) ? 255 : (U8)len;
2bda37ba 572 const unsigned char *const sb = s + len - mlen; /* first char (maybe) */
eb578fdb 573 U8 *table;
cf93c79d 574
2bda37ba 575 Newx(table, 256, U8);
7506f9c3 576 memset((void*)table, mlen, 256);
2bda37ba
NC
577 mg->mg_ptr = (char *)table;
578 mg->mg_len = 256;
579
580 s += len - 1; /* last char */
02128f11 581 i = 0;
cf93c79d
IZ
582 while (s >= sb) {
583 if (table[*s] == mlen)
7506f9c3 584 table[*s] = (U8)i;
cf93c79d
IZ
585 s--, i++;
586 }
378cc40b 587 }
378cc40b 588
9cbe880b 589 s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */
bbce6d69 590 for (i = 0; i < len; i++) {
22c35a8c 591 if (PL_freq[s[i]] < frequency) {
bbce6d69 592 rarest = i;
22c35a8c 593 frequency = PL_freq[s[i]];
378cc40b
LW
594 }
595 }
79072805 596 BmRARE(sv) = s[rarest];
44a10c71 597 BmPREVIOUS(sv) = rarest;
cf93c79d
IZ
598 BmUSEFUL(sv) = 100; /* Initial value */
599 if (flags & FBMcf_TAIL)
600 SvTAIL_on(sv);
ea725ce6
NC
601 DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %"UVuf"\n",
602 BmRARE(sv), BmPREVIOUS(sv)));
378cc40b
LW
603}
604
cf93c79d
IZ
605/* If SvTAIL(littlestr), it has a fake '\n' at end. */
606/* If SvTAIL is actually due to \Z or \z, this gives false positives
607 if multiline */
608
954c1994
GS
609/*
610=for apidoc fbm_instr
611
3f4963df
FC
612Returns the location of the SV in the string delimited by C<big> and
613C<bigend>. It returns C<NULL> if the string can't be found. The C<sv>
954c1994
GS
614does not have to be fbm_compiled, but the search will not be as fast
615then.
616
617=cut
618*/
619
378cc40b 620char *
5aaab254 621Perl_fbm_instr(pTHX_ unsigned char *big, unsigned char *bigend, SV *littlestr, U32 flags)
378cc40b 622{
eb578fdb 623 unsigned char *s;
cf93c79d 624 STRLEN l;
eb578fdb
KW
625 const unsigned char *little = (const unsigned char *)SvPV_const(littlestr,l);
626 STRLEN littlelen = l;
627 const I32 multiline = flags & FBMrf_MULTILINE;
cf93c79d 628
7918f24d
NC
629 PERL_ARGS_ASSERT_FBM_INSTR;
630
eb160463 631 if ((STRLEN)(bigend - big) < littlelen) {
a1d180c4 632 if ( SvTAIL(littlestr)
eb160463 633 && ((STRLEN)(bigend - big) == littlelen - 1)
a1d180c4 634 && (littlelen == 1
12ae5dfc 635 || (*big == *little &&
27da23d5 636 memEQ((char *)big, (char *)little, littlelen - 1))))
cf93c79d 637 return (char*)big;
bd61b366 638 return NULL;
cf93c79d 639 }
378cc40b 640
21aeb718
NC
641 switch (littlelen) { /* Special cases for 0, 1 and 2 */
642 case 0:
643 return (char*)big; /* Cannot be SvTAIL! */
644 case 1:
cf93c79d
IZ
645 if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
646 /* Know that bigend != big. */
647 if (bigend[-1] == '\n')
648 return (char *)(bigend - 1);
649 return (char *) bigend;
650 }
651 s = big;
652 while (s < bigend) {
653 if (*s == *little)
654 return (char *)s;
655 s++;
656 }
657 if (SvTAIL(littlestr))
658 return (char *) bigend;
bd61b366 659 return NULL;
21aeb718 660 case 2:
cf93c79d
IZ
661 if (SvTAIL(littlestr) && !multiline) {
662 if (bigend[-1] == '\n' && bigend[-2] == *little)
663 return (char*)bigend - 2;
664 if (bigend[-1] == *little)
665 return (char*)bigend - 1;
bd61b366 666 return NULL;
cf93c79d
IZ
667 }
668 {
669 /* This should be better than FBM if c1 == c2, and almost
670 as good otherwise: maybe better since we do less indirection.
671 And we save a lot of memory by caching no table. */
66a1b24b
AL
672 const unsigned char c1 = little[0];
673 const unsigned char c2 = little[1];
cf93c79d
IZ
674
675 s = big + 1;
676 bigend--;
677 if (c1 != c2) {
678 while (s <= bigend) {
679 if (s[0] == c2) {
680 if (s[-1] == c1)
681 return (char*)s - 1;
682 s += 2;
683 continue;
3fe6f2dc 684 }
cf93c79d
IZ
685 next_chars:
686 if (s[0] == c1) {
687 if (s == bigend)
688 goto check_1char_anchor;
689 if (s[1] == c2)
690 return (char*)s;
691 else {
692 s++;
693 goto next_chars;
694 }
695 }
696 else
697 s += 2;
698 }
699 goto check_1char_anchor;
700 }
701 /* Now c1 == c2 */
702 while (s <= bigend) {
703 if (s[0] == c1) {
704 if (s[-1] == c1)
705 return (char*)s - 1;
706 if (s == bigend)
707 goto check_1char_anchor;
708 if (s[1] == c1)
709 return (char*)s;
710 s += 3;
02128f11 711 }
c277df42 712 else
cf93c79d 713 s += 2;
c277df42 714 }
c277df42 715 }
cf93c79d
IZ
716 check_1char_anchor: /* One char and anchor! */
717 if (SvTAIL(littlestr) && (*bigend == *little))
718 return (char *)bigend; /* bigend is already decremented. */
bd61b366 719 return NULL;
21aeb718
NC
720 default:
721 break; /* Only lengths 0 1 and 2 have special-case code. */
d48672a2 722 }
21aeb718 723
cf93c79d 724 if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
bbce6d69 725 s = bigend - littlelen;
a1d180c4 726 if (s >= big && bigend[-1] == '\n' && *s == *little
cf93c79d
IZ
727 /* Automatically of length > 2 */
728 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
7506f9c3 729 {
bbce6d69 730 return (char*)s; /* how sweet it is */
7506f9c3
GS
731 }
732 if (s[1] == *little
733 && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
734 {
cf93c79d 735 return (char*)s + 1; /* how sweet it is */
7506f9c3 736 }
bd61b366 737 return NULL;
02128f11 738 }
cecf5685 739 if (!SvVALID(littlestr)) {
c4420975 740 char * const b = ninstr((char*)big,(char*)bigend,
cf93c79d
IZ
741 (char*)little, (char*)little + littlelen);
742
743 if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
744 /* Chop \n from littlestr: */
745 s = bigend - littlelen + 1;
7506f9c3
GS
746 if (*s == *little
747 && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
748 {
3fe6f2dc 749 return (char*)s;
7506f9c3 750 }
bd61b366 751 return NULL;
a687059c 752 }
cf93c79d 753 return b;
a687059c 754 }
a1d180c4 755
3566a07d
NC
756 /* Do actual FBM. */
757 if (littlelen > (STRLEN)(bigend - big))
758 return NULL;
759
760 {
2bda37ba
NC
761 const MAGIC *const mg = mg_find(littlestr, PERL_MAGIC_bm);
762 const unsigned char * const table = (const unsigned char *) mg->mg_ptr;
eb578fdb 763 const unsigned char *oldlittle;
cf93c79d 764
cf93c79d
IZ
765 --littlelen; /* Last char found by table lookup */
766
767 s = big + littlelen;
768 little += littlelen; /* last char */
769 oldlittle = little;
770 if (s < bigend) {
eb578fdb 771 I32 tmp;
cf93c79d
IZ
772
773 top2:
7506f9c3 774 if ((tmp = table[*s])) {
cf93c79d 775 if ((s += tmp) < bigend)
62b28dd9 776 goto top2;
cf93c79d
IZ
777 goto check_end;
778 }
779 else { /* less expensive than calling strncmp() */
eb578fdb 780 unsigned char * const olds = s;
cf93c79d
IZ
781
782 tmp = littlelen;
783
784 while (tmp--) {
785 if (*--s == *--little)
786 continue;
cf93c79d
IZ
787 s = olds + 1; /* here we pay the price for failure */
788 little = oldlittle;
789 if (s < bigend) /* fake up continue to outer loop */
790 goto top2;
791 goto check_end;
792 }
793 return (char *)s;
a687059c 794 }
378cc40b 795 }
cf93c79d 796 check_end:
c8029a41 797 if ( s == bigend
cffe132d 798 && SvTAIL(littlestr)
12ae5dfc
JH
799 && memEQ((char *)(bigend - littlelen),
800 (char *)(oldlittle - littlelen), littlelen) )
cf93c79d 801 return (char*)bigend - littlelen;
bd61b366 802 return NULL;
378cc40b 803 }
378cc40b
LW
804}
805
806char *
864dbfa3 807Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
378cc40b 808{
97aff369 809 dVAR;
7918f24d 810 PERL_ARGS_ASSERT_SCREAMINSTR;
9e3f0d16
FC
811 PERL_UNUSED_ARG(bigstr);
812 PERL_UNUSED_ARG(littlestr);
813 PERL_UNUSED_ARG(start_shift);
814 PERL_UNUSED_ARG(end_shift);
815 PERL_UNUSED_ARG(old_posp);
816 PERL_UNUSED_ARG(last);
817
818 /* This function must only ever be called on a scalar with study magic,
819 but those do not happen any more. */
820 Perl_croak(aTHX_ "panic: screaminstr");
bd61b366 821 return NULL;
8d063cd8
LW
822}
823
e6226b18
KW
824/*
825=for apidoc foldEQ
826
827Returns true if the leading len bytes of the strings s1 and s2 are the same
828case-insensitively; false otherwise. Uppercase and lowercase ASCII range bytes
829match themselves and their opposite case counterparts. Non-cased and non-ASCII
830range bytes match only themselves.
831
832=cut
833*/
834
835
79072805 836I32
5aaab254 837Perl_foldEQ(const char *s1, const char *s2, I32 len)
79072805 838{
eb578fdb
KW
839 const U8 *a = (const U8 *)s1;
840 const U8 *b = (const U8 *)s2;
96a5add6 841
e6226b18 842 PERL_ARGS_ASSERT_FOLDEQ;
7918f24d 843
223f01db
KW
844 assert(len >= 0);
845
79072805 846 while (len--) {
22c35a8c 847 if (*a != *b && *a != PL_fold[*b])
e6226b18 848 return 0;
bbce6d69
PP
849 a++,b++;
850 }
e6226b18 851 return 1;
bbce6d69 852}
1b9f127b 853I32
5aaab254 854Perl_foldEQ_latin1(const char *s1, const char *s2, I32 len)
1b9f127b
KW
855{
856 /* Compare non-utf8 using Unicode (Latin1) semantics. Does not work on
857 * MICRO_SIGN, LATIN_SMALL_LETTER_SHARP_S, nor
858 * LATIN_SMALL_LETTER_Y_WITH_DIAERESIS, and does not check for these. Nor
859 * does it check that the strings each have at least 'len' characters */
860
eb578fdb
KW
861 const U8 *a = (const U8 *)s1;
862 const U8 *b = (const U8 *)s2;
1b9f127b
KW
863
864 PERL_ARGS_ASSERT_FOLDEQ_LATIN1;
865
223f01db
KW
866 assert(len >= 0);
867
1b9f127b
KW
868 while (len--) {
869 if (*a != *b && *a != PL_fold_latin1[*b]) {
870 return 0;
871 }
872 a++, b++;
873 }
874 return 1;
875}
bbce6d69 876
e6226b18
KW
877/*
878=for apidoc foldEQ_locale
879
880Returns true if the leading len bytes of the strings s1 and s2 are the same
881case-insensitively in the current locale; false otherwise.
882
883=cut
884*/
885
bbce6d69 886I32
5aaab254 887Perl_foldEQ_locale(const char *s1, const char *s2, I32 len)
bbce6d69 888{
27da23d5 889 dVAR;
eb578fdb
KW
890 const U8 *a = (const U8 *)s1;
891 const U8 *b = (const U8 *)s2;
96a5add6 892
e6226b18 893 PERL_ARGS_ASSERT_FOLDEQ_LOCALE;
7918f24d 894
223f01db
KW
895 assert(len >= 0);
896
bbce6d69 897 while (len--) {
22c35a8c 898 if (*a != *b && *a != PL_fold_locale[*b])
e6226b18 899 return 0;
bbce6d69 900 a++,b++;
79072805 901 }
e6226b18 902 return 1;
79072805
LW
903}
904
8d063cd8
LW
905/* copy a string to a safe spot */
906
954c1994 907/*
ccfc67b7
JH
908=head1 Memory Management
909
954c1994
GS
910=for apidoc savepv
911
61a925ed
AMS
912Perl's version of C<strdup()>. Returns a pointer to a newly allocated
913string which is a duplicate of C<pv>. The size of the string is
914determined by C<strlen()>. The memory allocated for the new string can
915be freed with the C<Safefree()> function.
954c1994
GS
916
917=cut
918*/
919
8d063cd8 920char *
efdfce31 921Perl_savepv(pTHX_ const char *pv)
8d063cd8 922{
96a5add6 923 PERL_UNUSED_CONTEXT;
e90e2364 924 if (!pv)
bd61b366 925 return NULL;
66a1b24b
AL
926 else {
927 char *newaddr;
928 const STRLEN pvlen = strlen(pv)+1;
10edeb5d
JH
929 Newx(newaddr, pvlen, char);
930 return (char*)memcpy(newaddr, pv, pvlen);
66a1b24b 931 }
8d063cd8
LW
932}
933
a687059c
LW
934/* same thing but with a known length */
935
954c1994
GS
936/*
937=for apidoc savepvn
938
61a925ed
AMS
939Perl's version of what C<strndup()> would be if it existed. Returns a
940pointer to a newly allocated string which is a duplicate of the first
cbf82dd0
NC
941C<len> bytes from C<pv>, plus a trailing NUL byte. The memory allocated for
942the new string can be freed with the C<Safefree()> function.
954c1994
GS
943
944=cut
945*/
946
a687059c 947char *
5aaab254 948Perl_savepvn(pTHX_ const char *pv, I32 len)
a687059c 949{
eb578fdb 950 char *newaddr;
96a5add6 951 PERL_UNUSED_CONTEXT;
a687059c 952
223f01db
KW
953 assert(len >= 0);
954
a02a5408 955 Newx(newaddr,len+1,char);
92110913 956 /* Give a meaning to NULL pointer mainly for the use in sv_magic() */
efdfce31 957 if (pv) {
e90e2364
NC
958 /* might not be null terminated */
959 newaddr[len] = '\0';
07409e01 960 return (char *) CopyD(pv,newaddr,len,char);
92110913
NIS
961 }
962 else {
07409e01 963 return (char *) ZeroD(newaddr,len+1,char);
92110913 964 }
a687059c
LW
965}
966
05ec9bb3
NIS
967/*
968=for apidoc savesharedpv
969
61a925ed
AMS
970A version of C<savepv()> which allocates the duplicate string in memory
971which is shared between threads.
05ec9bb3
NIS
972
973=cut
974*/
975char *
efdfce31 976Perl_savesharedpv(pTHX_ const char *pv)
05ec9bb3 977{
eb578fdb 978 char *newaddr;
490a0e98 979 STRLEN pvlen;
e90e2364 980 if (!pv)
bd61b366 981 return NULL;
e90e2364 982
490a0e98
NC
983 pvlen = strlen(pv)+1;
984 newaddr = (char*)PerlMemShared_malloc(pvlen);
e90e2364 985 if (!newaddr) {
4cbe3a7d 986 croak_no_mem();
05ec9bb3 987 }
10edeb5d 988 return (char*)memcpy(newaddr, pv, pvlen);
05ec9bb3
NIS
989}
990
2e0de35c 991/*
d9095cec
NC
992=for apidoc savesharedpvn
993
994A version of C<savepvn()> which allocates the duplicate string in memory
995which is shared between threads. (With the specific difference that a NULL
996pointer is not acceptable)
997
998=cut
999*/
1000char *
1001Perl_savesharedpvn(pTHX_ const char *const pv, const STRLEN len)
1002{
1003 char *const newaddr = (char*)PerlMemShared_malloc(len + 1);
7918f24d 1004
6379d4a9 1005 /* PERL_ARGS_ASSERT_SAVESHAREDPVN; */
7918f24d 1006
d9095cec 1007 if (!newaddr) {
4cbe3a7d 1008 croak_no_mem();
d9095cec
NC
1009 }
1010 newaddr[len] = '\0';
1011 return (char*)memcpy(newaddr, pv, len);
1012}
1013
1014/*
2e0de35c
NC
1015=for apidoc savesvpv
1016
6832267f 1017A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from
2e0de35c
NC
1018the passed in SV using C<SvPV()>
1019
1020=cut
1021*/
1022
1023char *
1024Perl_savesvpv(pTHX_ SV *sv)
1025{
1026 STRLEN len;
7452cf6a 1027 const char * const pv = SvPV_const(sv, len);
eb578fdb 1028 char *newaddr;
2e0de35c 1029
7918f24d
NC
1030 PERL_ARGS_ASSERT_SAVESVPV;
1031
26866f99 1032 ++len;
a02a5408 1033 Newx(newaddr,len,char);
07409e01 1034 return (char *) CopyD(pv,newaddr,len,char);
2e0de35c 1035}
05ec9bb3 1036
9dcc53ea
Z
1037/*
1038=for apidoc savesharedsvpv
1039
1040A version of C<savesharedpv()> which allocates the duplicate string in
1041memory which is shared between threads.
1042
1043=cut
1044*/
1045
1046char *
1047Perl_savesharedsvpv(pTHX_ SV *sv)
1048{
1049 STRLEN len;
1050 const char * const pv = SvPV_const(sv, len);
1051
1052 PERL_ARGS_ASSERT_SAVESHAREDSVPV;
1053
1054 return savesharedpvn(pv, len);
1055}
05ec9bb3 1056
cea2e8a9 1057/* the SV for Perl_form() and mess() is not kept in an arena */
fc36a67e 1058
76e3520e 1059STATIC SV *
cea2e8a9 1060S_mess_alloc(pTHX)
fc36a67e 1061{
97aff369 1062 dVAR;
fc36a67e
PP
1063 SV *sv;
1064 XPVMG *any;
1065
627364f1 1066 if (PL_phase != PERL_PHASE_DESTRUCT)
84bafc02 1067 return newSVpvs_flags("", SVs_TEMP);
e72dc28c 1068
0372dbb6
GS
1069 if (PL_mess_sv)
1070 return PL_mess_sv;
1071
fc36a67e 1072 /* Create as PVMG now, to avoid any upgrading later */
a02a5408
JC
1073 Newx(sv, 1, SV);
1074 Newxz(any, 1, XPVMG);
fc36a67e
PP
1075 SvFLAGS(sv) = SVt_PVMG;
1076 SvANY(sv) = (void*)any;
6136c704 1077 SvPV_set(sv, NULL);
fc36a67e 1078 SvREFCNT(sv) = 1 << 30; /* practically infinite */
e72dc28c 1079 PL_mess_sv = sv;
fc36a67e
PP
1080 return sv;
1081}
1082
c5be433b 1083#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1084char *
1085Perl_form_nocontext(const char* pat, ...)
1086{
1087 dTHX;
c5be433b 1088 char *retval;
cea2e8a9 1089 va_list args;
7918f24d 1090 PERL_ARGS_ASSERT_FORM_NOCONTEXT;
cea2e8a9 1091 va_start(args, pat);
c5be433b 1092 retval = vform(pat, &args);
cea2e8a9 1093 va_end(args);
c5be433b 1094 return retval;
cea2e8a9 1095}
c5be433b 1096#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9 1097
7c9e965c 1098/*
ccfc67b7 1099=head1 Miscellaneous Functions
7c9e965c
JP
1100=for apidoc form
1101
1102Takes a sprintf-style format pattern and conventional
1103(non-SV) arguments and returns the formatted string.
1104
1105 (char *) Perl_form(pTHX_ const char* pat, ...)
1106
1107can be used any place a string (char *) is required:
1108
1109 char * s = Perl_form("%d.%d",major,minor);
1110
1111Uses a single private buffer so if you want to format several strings you
1112must explicitly copy the earlier strings away (and free the copies when you
1113are done).
1114
1115=cut
1116*/
1117
8990e307 1118char *
864dbfa3 1119Perl_form(pTHX_ const char* pat, ...)
8990e307 1120{
c5be433b 1121 char *retval;
46fc3d4c 1122 va_list args;
7918f24d 1123 PERL_ARGS_ASSERT_FORM;
46fc3d4c 1124 va_start(args, pat);
c5be433b 1125 retval = vform(pat, &args);
46fc3d4c 1126 va_end(args);
c5be433b
GS
1127 return retval;
1128}
1129
1130char *
1131Perl_vform(pTHX_ const char *pat, va_list *args)
1132{
2d03de9c 1133 SV * const sv = mess_alloc();
7918f24d 1134 PERL_ARGS_ASSERT_VFORM;
4608196e 1135 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
e72dc28c 1136 return SvPVX(sv);
46fc3d4c 1137}
a687059c 1138
c5df3096
Z
1139/*
1140=for apidoc Am|SV *|mess|const char *pat|...
1141
1142Take a sprintf-style format pattern and argument list. These are used to
1143generate a string message. If the message does not end with a newline,
1144then it will be extended with some indication of the current location
1145in the code, as described for L</mess_sv>.
1146
1147Normally, the resulting message is returned in a new mortal SV.
1148During global destruction a single SV may be shared between uses of
1149this function.
1150
1151=cut
1152*/
1153
5a844595
GS
1154#if defined(PERL_IMPLICIT_CONTEXT)
1155SV *
1156Perl_mess_nocontext(const char *pat, ...)
1157{
1158 dTHX;
1159 SV *retval;
1160 va_list args;
7918f24d 1161 PERL_ARGS_ASSERT_MESS_NOCONTEXT;
5a844595
GS
1162 va_start(args, pat);
1163 retval = vmess(pat, &args);
1164 va_end(args);
1165 return retval;
1166}
1167#endif /* PERL_IMPLICIT_CONTEXT */
1168
06bf62c7 1169SV *
5a844595
GS
1170Perl_mess(pTHX_ const char *pat, ...)
1171{
1172 SV *retval;
1173 va_list args;
7918f24d 1174 PERL_ARGS_ASSERT_MESS;
5a844595
GS
1175 va_start(args, pat);
1176 retval = vmess(pat, &args);
1177 va_end(args);
1178 return retval;
1179}
1180
5f66b61c
AL
1181STATIC const COP*
1182S_closest_cop(pTHX_ const COP *cop, const OP *o)
ae7d165c 1183{
97aff369 1184 dVAR;
ae7d165c
PJ
1185 /* Look for PL_op starting from o. cop is the last COP we've seen. */
1186
7918f24d
NC
1187 PERL_ARGS_ASSERT_CLOSEST_COP;
1188
fabdb6c0
AL
1189 if (!o || o == PL_op)
1190 return cop;
ae7d165c
PJ
1191
1192 if (o->op_flags & OPf_KIDS) {
5f66b61c 1193 const OP *kid;
fabdb6c0 1194 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
5f66b61c 1195 const COP *new_cop;
ae7d165c
PJ
1196
1197 /* If the OP_NEXTSTATE has been optimised away we can still use it
1198 * the get the file and line number. */
1199
1200 if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
5f66b61c 1201 cop = (const COP *)kid;
ae7d165c
PJ
1202
1203 /* Keep searching, and return when we've found something. */
1204
1205 new_cop = closest_cop(cop, kid);
fabdb6c0
AL
1206 if (new_cop)
1207 return new_cop;
ae7d165c
PJ
1208 }
1209 }
1210
1211 /* Nothing found. */
1212
5f66b61c 1213 return NULL;
ae7d165c
PJ
1214}
1215
c5df3096
Z
1216/*
1217=for apidoc Am|SV *|mess_sv|SV *basemsg|bool consume
1218
1219Expands a message, intended for the user, to include an indication of
1220the current location in the code, if the message does not already appear
1221to be complete.
1222
1223C<basemsg> is the initial message or object. If it is a reference, it
1224will be used as-is and will be the result of this function. Otherwise it
1225is used as a string, and if it already ends with a newline, it is taken
1226to be complete, and the result of this function will be the same string.
1227If the message does not end with a newline, then a segment such as C<at
1228foo.pl line 37> will be appended, and possibly other clauses indicating
1229the current state of execution. The resulting message will end with a
1230dot and a newline.
1231
1232Normally, the resulting message is returned in a new mortal SV.
1233During global destruction a single SV may be shared between uses of this
1234function. If C<consume> is true, then the function is permitted (but not
1235required) to modify and return C<basemsg> instead of allocating a new SV.
1236
1237=cut
1238*/
1239
5a844595 1240SV *
c5df3096 1241Perl_mess_sv(pTHX_ SV *basemsg, bool consume)
46fc3d4c 1242{
97aff369 1243 dVAR;
c5df3096 1244 SV *sv;
46fc3d4c 1245
c5df3096
Z
1246 PERL_ARGS_ASSERT_MESS_SV;
1247
1248 if (SvROK(basemsg)) {
1249 if (consume) {
1250 sv = basemsg;
1251 }
1252 else {
1253 sv = mess_alloc();
1254 sv_setsv(sv, basemsg);
1255 }
1256 return sv;
1257 }
1258
1259 if (SvPOK(basemsg) && consume) {
1260 sv = basemsg;
1261 }
1262 else {
1263 sv = mess_alloc();
1264 sv_copypv(sv, basemsg);
1265 }
7918f24d 1266
46fc3d4c 1267 if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
ae7d165c
PJ
1268 /*
1269 * Try and find the file and line for PL_op. This will usually be
1270 * PL_curcop, but it might be a cop that has been optimised away. We
1271 * can try to find such a cop by searching through the optree starting
1272 * from the sibling of PL_curcop.
1273 */
1274
e1ec3a88 1275 const COP *cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
5f66b61c
AL
1276 if (!cop)
1277 cop = PL_curcop;
ae7d165c
PJ
1278
1279 if (CopLINE(cop))
ed094faf 1280 Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
3aed30dc 1281 OutCopFILE(cop), (IV)CopLINE(cop));
191f87d5
DH
1282 /* Seems that GvIO() can be untrustworthy during global destruction. */
1283 if (GvIO(PL_last_in_gv) && (SvTYPE(GvIOp(PL_last_in_gv)) == SVt_PVIO)
1284 && IoLINES(GvIOp(PL_last_in_gv)))
1285 {
2748e602 1286 STRLEN l;
e1ec3a88 1287 const bool line_mode = (RsSIMPLE(PL_rs) &&
2748e602 1288 *SvPV_const(PL_rs,l) == '\n' && l == 1);
3b46b707
BF
1289 Perl_sv_catpvf(aTHX_ sv, ", <%"SVf"> %s %"IVdf,
1290 SVfARG(PL_last_in_gv == PL_argvgv
1291 ? &PL_sv_no
1292 : sv_2mortal(newSVhek(GvNAME_HEK(PL_last_in_gv)))),
edc2eac3
JH
1293 line_mode ? "line" : "chunk",
1294 (IV)IoLINES(GvIOp(PL_last_in_gv)));
a687059c 1295 }
627364f1 1296 if (PL_phase == PERL_PHASE_DESTRUCT)
5f66b61c
AL
1297 sv_catpvs(sv, " during global destruction");
1298 sv_catpvs(sv, ".\n");
a687059c 1299 }
06bf62c7 1300 return sv;
a687059c
LW
1301}
1302
c5df3096
Z
1303/*
1304=for apidoc Am|SV *|vmess|const char *pat|va_list *args
1305
1306C<pat> and C<args> are a sprintf-style format pattern and encapsulated
1307argument list. These are used to generate a string message. If the
1308message does not end with a newline, then it will be extended with
1309some indication of the current location in the code, as described for
1310L</mess_sv>.
1311
1312Normally, the resulting message is returned in a new mortal SV.
1313During global destruction a single SV may be shared between uses of
1314this function.
1315
1316=cut
1317*/
1318
1319SV *
1320Perl_vmess(pTHX_ const char *pat, va_list *args)
1321{
1322 dVAR;
1323 SV * const sv = mess_alloc();
1324
1325 PERL_ARGS_ASSERT_VMESS;
1326
1327 sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL);
1328 return mess_sv(sv, 1);
1329}
1330
7ff03255 1331void
7d0994e0 1332Perl_write_to_stderr(pTHX_ SV* msv)
7ff03255 1333{
27da23d5 1334 dVAR;
7ff03255
SG
1335 IO *io;
1336 MAGIC *mg;
1337
7918f24d
NC
1338 PERL_ARGS_ASSERT_WRITE_TO_STDERR;
1339
7ff03255
SG
1340 if (PL_stderrgv && SvREFCNT(PL_stderrgv)
1341 && (io = GvIO(PL_stderrgv))
daba3364 1342 && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar)))
d1d7a15d
NC
1343 Perl_magic_methcall(aTHX_ MUTABLE_SV(io), mg, "PRINT",
1344 G_SCALAR | G_DISCARD | G_WRITING_TO_STDERR, 1, msv);
7ff03255
SG
1345 else {
1346#ifdef USE_SFIO
1347 /* SFIO can really mess with your errno */
4ee39169 1348 dSAVED_ERRNO;
7ff03255 1349#endif
53c1dcc0 1350 PerlIO * const serr = Perl_error_log;
7ff03255 1351
83c55556 1352 do_print(msv, serr);
7ff03255
SG
1353 (void)PerlIO_flush(serr);
1354#ifdef USE_SFIO
4ee39169 1355 RESTORE_ERRNO;
7ff03255
SG
1356#endif
1357 }
1358}
1359
c5df3096
Z
1360/*
1361=head1 Warning and Dieing
1362*/
1363
1364/* Common code used in dieing and warning */
1365
1366STATIC SV *
1367S_with_queued_errors(pTHX_ SV *ex)
1368{
1369 PERL_ARGS_ASSERT_WITH_QUEUED_ERRORS;
1370 if (PL_errors && SvCUR(PL_errors) && !SvROK(ex)) {
1371 sv_catsv(PL_errors, ex);
1372 ex = sv_mortalcopy(PL_errors);
1373 SvCUR_set(PL_errors, 0);
1374 }
1375 return ex;
1376}
3ab1ac99 1377
46d9c920 1378STATIC bool
c5df3096 1379S_invoke_exception_hook(pTHX_ SV *ex, bool warn)
63315e18 1380{
97aff369 1381 dVAR;
63315e18
NC
1382 HV *stash;
1383 GV *gv;
1384 CV *cv;
46d9c920
NC
1385 SV **const hook = warn ? &PL_warnhook : &PL_diehook;
1386 /* sv_2cv might call Perl_croak() or Perl_warner() */
1387 SV * const oldhook = *hook;
1388
c5df3096
Z
1389 if (!oldhook)
1390 return FALSE;
63315e18 1391
63315e18 1392 ENTER;
46d9c920
NC
1393 SAVESPTR(*hook);
1394 *hook = NULL;
1395 cv = sv_2cv(oldhook, &stash, &gv, 0);
63315e18
NC
1396 LEAVE;
1397 if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
1398 dSP;
c5df3096 1399 SV *exarg;
63315e18
NC
1400
1401 ENTER;
1402 save_re_context();
46d9c920
NC
1403 if (warn) {
1404 SAVESPTR(*hook);
1405 *hook = NULL;
1406 }
c5df3096
Z
1407 exarg = newSVsv(ex);
1408 SvREADONLY_on(exarg);
1409 SAVEFREESV(exarg);
63315e18 1410
46d9c920 1411 PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK);
63315e18 1412 PUSHMARK(SP);
c5df3096 1413 XPUSHs(exarg);
63315e18 1414 PUTBACK;
daba3364 1415 call_sv(MUTABLE_SV(cv), G_DISCARD);
63315e18
NC
1416 POPSTACK;
1417 LEAVE;
46d9c920 1418 return TRUE;
63315e18 1419 }
46d9c920 1420 return FALSE;
63315e18
NC
1421}
1422
c5df3096
Z
1423/*
1424=for apidoc Am|OP *|die_sv|SV *baseex
e07360fa 1425
c5df3096
Z
1426Behaves the same as L</croak_sv>, except for the return type.
1427It should be used only where the C<OP *> return type is required.
1428The function never actually returns.
e07360fa 1429
c5df3096
Z
1430=cut
1431*/
e07360fa 1432
c5df3096
Z
1433OP *
1434Perl_die_sv(pTHX_ SV *baseex)
36477c24 1435{
c5df3096
Z
1436 PERL_ARGS_ASSERT_DIE_SV;
1437 croak_sv(baseex);
118e2215 1438 assert(0); /* NOTREACHED */
ad09800f 1439 return NULL;
36477c24
PP
1440}
1441
c5df3096
Z
1442/*
1443=for apidoc Am|OP *|die|const char *pat|...
1444
1445Behaves the same as L</croak>, except for the return type.
1446It should be used only where the C<OP *> return type is required.
1447The function never actually returns.
1448
1449=cut
1450*/
1451
c5be433b 1452#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1453OP *
1454Perl_die_nocontext(const char* pat, ...)
a687059c 1455{
cea2e8a9 1456 dTHX;
a687059c 1457 va_list args;
cea2e8a9 1458 va_start(args, pat);
c5df3096 1459 vcroak(pat, &args);
118e2215 1460 assert(0); /* NOTREACHED */
cea2e8a9 1461 va_end(args);
c5df3096 1462 return NULL;
cea2e8a9 1463}
c5be433b 1464#endif /* PERL_IMPLICIT_CONTEXT */
cea2e8a9
GS
1465
1466OP *
1467Perl_die(pTHX_ const char* pat, ...)
1468{
cea2e8a9
GS
1469 va_list args;
1470 va_start(args, pat);
c5df3096 1471 vcroak(pat, &args);
118e2215 1472 assert(0); /* NOTREACHED */
cea2e8a9 1473 va_end(args);
c5df3096 1474 return NULL;
cea2e8a9
GS
1475}
1476
c5df3096
Z
1477/*
1478=for apidoc Am|void|croak_sv|SV *baseex
1479
1480This is an XS interface to Perl's C<die> function.
1481
1482C<baseex> is the error message or object. If it is a reference, it
1483will be used as-is. Otherwise it is used as a string, and if it does
1484not end with a newline then it will be extended with some indication of
1485the current location in the code, as described for L</mess_sv>.
1486
1487The error message or object will be used as an exception, by default
1488returning control to the nearest enclosing C<eval>, but subject to
1489modification by a C<$SIG{__DIE__}> handler. In any case, the C<croak_sv>
1490function never returns normally.
1491
1492To die with a simple string message, the L</croak> function may be
1493more convenient.
1494
1495=cut
1496*/
1497
c5be433b 1498void
c5df3096 1499Perl_croak_sv(pTHX_ SV *baseex)
cea2e8a9 1500{
c5df3096
Z
1501 SV *ex = with_queued_errors(mess_sv(baseex, 0));
1502 PERL_ARGS_ASSERT_CROAK_SV;
1503 invoke_exception_hook(ex, FALSE);
1504 die_unwind(ex);
1505}
1506
1507/*
1508=for apidoc Am|void|vcroak|const char *pat|va_list *args
1509
1510This is an XS interface to Perl's C<die> function.
1511
1512C<pat> and C<args> are a sprintf-style format pattern and encapsulated
1513argument list. These are used to generate a string message. If the
1514message does not end with a newline, then it will be extended with
1515some indication of the current location in the code, as described for
1516L</mess_sv>.
1517
1518The error message will be used as an exception, by default
1519returning control to the nearest enclosing C<eval>, but subject to
1520modification by a C<$SIG{__DIE__}> handler. In any case, the C<croak>
1521function never returns normally.
a687059c 1522
c5df3096
Z
1523For historical reasons, if C<pat> is null then the contents of C<ERRSV>
1524(C<$@>) will be used as an error message or object instead of building an
1525error message from arguments. If you want to throw a non-string object,
1526or build an error message in an SV yourself, it is preferable to use
1527the L</croak_sv> function, which does not involve clobbering C<ERRSV>.
5a844595 1528
c5df3096
Z
1529=cut
1530*/
1531
1532void
1533Perl_vcroak(pTHX_ const char* pat, va_list *args)
1534{
1535 SV *ex = with_queued_errors(pat ? vmess(pat, args) : mess_sv(ERRSV, 0));
1536 invoke_exception_hook(ex, FALSE);
1537 die_unwind(ex);
a687059c
LW
1538}
1539
c5df3096
Z
1540/*
1541=for apidoc Am|void|croak|const char *pat|...
1542
1543This is an XS interface to Perl's C<die> function.
1544
1545Take a sprintf-style format pattern and argument list. These are used to
1546generate a string message. If the message does not end with a newline,
1547then it will be extended with some indication of the current location
1548in the code, as described for L</mess_sv>.
1549
1550The error message will be used as an exception, by default
1551returning control to the nearest enclosing C<eval>, but subject to
1552modification by a C<$SIG{__DIE__}> handler. In any case, the C<croak>
1553function never returns normally.
1554
1555For historical reasons, if C<pat> is null then the contents of C<ERRSV>
1556(C<$@>) will be used as an error message or object instead of building an
1557error message from arguments. If you want to throw a non-string object,
1558or build an error message in an SV yourself, it is preferable to use
1559the L</croak_sv> function, which does not involve clobbering C<ERRSV>.
1560
1561=cut
1562*/
1563
c5be433b 1564#if defined(PERL_IMPLICIT_CONTEXT)
8990e307 1565void
cea2e8a9 1566Perl_croak_nocontext(const char *pat, ...)
a687059c 1567{
cea2e8a9 1568 dTHX;
a687059c 1569 va_list args;
cea2e8a9 1570 va_start(args, pat);
c5be433b 1571 vcroak(pat, &args);
118e2215 1572 assert(0); /* NOTREACHED */
cea2e8a9
GS
1573 va_end(args);
1574}
1575#endif /* PERL_IMPLICIT_CONTEXT */
1576
c5df3096
Z
1577void
1578Perl_croak(pTHX_ const char *pat, ...)
1579{
1580 va_list args;
1581 va_start(args, pat);
1582 vcroak(pat, &args);
118e2215 1583 assert(0); /* NOTREACHED */
c5df3096
Z
1584 va_end(args);
1585}
1586
954c1994 1587/*
6ad8f254
NC
1588=for apidoc Am|void|croak_no_modify
1589
1590Exactly equivalent to C<Perl_croak(aTHX_ "%s", PL_no_modify)>, but generates
1591terser object code than using C<Perl_croak>. Less code used on exception code
1592paths reduces CPU cache pressure.
1593
d8e47b5c 1594=cut
6ad8f254
NC
1595*/
1596
1597void
cb077ed2 1598Perl_croak_no_modify()
6ad8f254 1599{
cb077ed2 1600 Perl_croak_nocontext( "%s", PL_no_modify);
6ad8f254
NC
1601}
1602
4cbe3a7d
DD
1603/* does not return, used in util.c perlio.c and win32.c
1604 This is typically called when malloc returns NULL.
1605*/
1606void
1607Perl_croak_no_mem()
1608{
1609 dTHX;
77c1c05b 1610
4cbe3a7d
DD
1611 /* Can't use PerlIO to write as it allocates memory */
1612 PerlLIO_write(PerlIO_fileno(Perl_error_log),
1613 PL_no_mem, sizeof(PL_no_mem)-1);
1614 my_exit(1);
1615}
1616
43387ee1
AD
1617/* saves machine code for a common noreturn idiom typically used in Newx*() */
1618void
1619Perl_croak_memory_wrap(void)
1620{
1621 Perl_croak_nocontext("%s",PL_memory_wrap);
1622}
1623
1624
3d04513d
DD
1625/* does not return, used only in POPSTACK */
1626void
1627Perl_croak_popstack(void)
1628{
1629 dTHX;
1630 PerlIO_printf(Perl_error_log, "panic: POPSTACK\n");
1631 my_exit(1);
1632}
1633
6ad8f254 1634/*
c5df3096 1635=for apidoc Am|void|warn_sv|SV *baseex
ccfc67b7 1636
c5df3096 1637This is an XS interface to Perl's C<warn> function.
954c1994 1638
c5df3096
Z
1639C<baseex> is the error message or object. If it is a reference, it
1640will be used as-is. Otherwise it is used as a string, and if it does
1641not end with a newline then it will be extended with some indication of
1642the current location in the code, as described for L</mess_sv>.
9983fa3c 1643
c5df3096
Z
1644The error message or object will by default be written to standard error,
1645but this is subject to modification by a C<$SIG{__WARN__}> handler.
9983fa3c 1646
c5df3096
Z
1647To warn with a simple string message, the L</warn> function may be
1648more convenient.
954c1994
GS
1649
1650=cut
1651*/
1652
cea2e8a9 1653void
c5df3096 1654Perl_warn_sv(pTHX_ SV *baseex)
cea2e8a9 1655{
c5df3096
Z
1656 SV *ex = mess_sv(baseex, 0);
1657 PERL_ARGS_ASSERT_WARN_SV;
1658 if (!invoke_exception_hook(ex, TRUE))
1659 write_to_stderr(ex);
cea2e8a9
GS
1660}
1661
c5df3096
Z
1662/*
1663=for apidoc Am|void|vwarn|const char *pat|va_list *args
1664
1665This is an XS interface to Perl's C<warn> function.
1666
1667C<pat> and C<args> are a sprintf-style format pattern and encapsulated
1668argument list. These are used to generate a string message. If the
1669message does not end with a newline, then it will be extended with
1670some indication of the current location in the code, as described for
1671L</mess_sv>.
1672
1673The error message or object will by default be written to standard error,
1674but this is subject to modification by a C<$SIG{__WARN__}> handler.
1675
1676Unlike with L</vcroak>, C<pat> is not permitted to be null.
1677
1678=cut
1679*/
1680
c5be433b
GS
1681void
1682Perl_vwarn(pTHX_ const char* pat, va_list *args)
cea2e8a9 1683{
c5df3096 1684 SV *ex = vmess(pat, args);
7918f24d 1685 PERL_ARGS_ASSERT_VWARN;
c5df3096
Z
1686 if (!invoke_exception_hook(ex, TRUE))
1687 write_to_stderr(ex);
1688}
7918f24d 1689
c5df3096
Z
1690/*
1691=for apidoc Am|void|warn|const char *pat|...
87582a92 1692
c5df3096
Z
1693This is an XS interface to Perl's C<warn> function.
1694
1695Take a sprintf-style format pattern and argument list. These are used to
1696generate a string message. If the message does not end with a newline,
1697then it will be extended with some indication of the current location
1698in the code, as described for L</mess_sv>.
1699
1700The error message or object will by default be written to standard error,
1701but this is subject to modification by a C<$SIG{__WARN__}> handler.
1702
1703Unlike with L</croak>, C<pat> is not permitted to be null.
1704
1705=cut
1706*/
8d063cd8 1707
c5be433b 1708#if defined(PERL_IMPLICIT_CONTEXT)
cea2e8a9
GS
1709void
1710Perl_warn_nocontext(const char *pat, ...)
1711{
1712 dTHX;
1713 va_list args;
7918f24d 1714 PERL_ARGS_ASSERT_WARN_NOCONTEXT;
cea2e8a9 1715 va_start(args, pat);
c5be433b 1716 vwarn(pat, &args);
cea2e8a9
GS
1717 va_end(args);
1718}
1719#endif /* PERL_IMPLICIT_CONTEXT */
1720
1721void
1722Perl_warn(pTHX_ const char *pat, ...)
1723{
1724 va_list args;
7918f24d 1725 PERL_ARGS_ASSERT_WARN;
cea2e8a9 1726 va_start(args, pat);
c5be433b 1727 vwarn(pat, &args);
cea2e8a9
GS
1728 va_end(args);
1729}
1730
c5be433b
GS
1731#if defined(PERL_IMPLICIT_CONTEXT)
1732void
1733Perl_warner_nocontext(U32 err, const char *pat, ...)
1734{
27da23d5 1735 dTHX;
c5be433b 1736 va_list args;
7918f24d 1737 PERL_ARGS_ASSERT_WARNER_NOCONTEXT;
c5be433b
GS
1738 va_start(args, pat);
1739 vwarner(err, pat, &args);
1740 va_end(args);
1741}
1742#endif /* PERL_IMPLICIT_CONTEXT */
1743
599cee73 1744void
9b387841
NC
1745Perl_ck_warner_d(pTHX_ U32 err, const char* pat, ...)
1746{
1747 PERL_ARGS_ASSERT_CK_WARNER_D;
1748
1749 if (Perl_ckwarn_d(aTHX_ err)) {
1750 va_list args;
1751 va_start(args, pat);
1752 vwarner(err, pat, &args);
1753 va_end(args);
1754 }
1755}
1756
1757void
a2a5de95
NC
1758Perl_ck_warner(pTHX_ U32 err, const char* pat, ...)
1759{
1760 PERL_ARGS_ASSERT_CK_WARNER;
1761
1762 if (Perl_ckwarn(aTHX_ err)) {
1763 va_list args;
1764 va_start(args, pat);
1765 vwarner(err, pat, &args);
1766 va_end(args);
1767 }
1768}
1769
1770void
864dbfa3 1771Perl_warner(pTHX_ U32 err, const char* pat,...)
599cee73
PM
1772{
1773 va_list args;
7918f24d 1774 PERL_ARGS_ASSERT_WARNER;
c5be433b
GS
1775 va_start(args, pat);
1776 vwarner(err, pat, &args);
1777 va_end(args);
1778}
1779
1780void
1781Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
1782{
27da23d5 1783 dVAR;
7918f24d 1784 PERL_ARGS_ASSERT_VWARNER;
5f2d9966 1785 if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
a3b680e6 1786 SV * const msv = vmess(pat, args);
599cee73 1787
c5df3096
Z
1788 invoke_exception_hook(msv, FALSE);
1789 die_unwind(msv);
599cee73
PM
1790 }
1791 else {
d13b0d77 1792 Perl_vwarn(aTHX_ pat, args);
599cee73
PM
1793 }
1794}
1795
f54ba1c2
DM
1796/* implements the ckWARN? macros */
1797
1798bool
1799Perl_ckwarn(pTHX_ U32 w)
1800{
97aff369 1801 dVAR;
ad287e37
NC
1802 /* If lexical warnings have not been set, use $^W. */
1803 if (isLEXWARN_off)
1804 return PL_dowarn & G_WARN_ON;
1805
26c7b074 1806 return ckwarn_common(w);
f54ba1c2
DM
1807}
1808
1809/* implements the ckWARN?_d macro */
1810
1811bool
1812Perl_ckwarn_d(pTHX_ U32 w)
1813{
97aff369 1814 dVAR;
ad287e37
NC
1815 /* If lexical warnings have not been set then default classes warn. */
1816 if (isLEXWARN_off)
1817 return TRUE;
1818
26c7b074
NC
1819 return ckwarn_common(w);
1820}
1821
1822static bool
1823S_ckwarn_common(pTHX_ U32 w)
1824{
ad287e37
NC
1825 if (PL_curcop->cop_warnings == pWARN_ALL)
1826 return TRUE;
1827
1828 if (PL_curcop->cop_warnings == pWARN_NONE)
1829 return FALSE;
1830
98fe6610
NC
1831 /* Check the assumption that at least the first slot is non-zero. */
1832 assert(unpackWARN1(w));
1833
1834 /* Check the assumption that it is valid to stop as soon as a zero slot is
1835 seen. */
1836 if (!unpackWARN2(w)) {
1837 assert(!unpackWARN3(w));
1838 assert(!unpackWARN4(w));
1839 } else if (!unpackWARN3(w)) {
1840 assert(!unpackWARN4(w));
1841 }
1842
26c7b074
NC
1843 /* Right, dealt with all the special cases, which are implemented as non-
1844 pointers, so there is a pointer to a real warnings mask. */
98fe6610
NC
1845 do {
1846 if (isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w)))
1847 return TRUE;
1848 } while (w >>= WARNshift);
1849
1850 return FALSE;
f54ba1c2
DM
1851}
1852
72dc9ed5
NC
1853/* Set buffer=NULL to get a new one. */
1854STRLEN *
8ee4cf24 1855Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits,
72dc9ed5 1856 STRLEN size) {
5af88345
FC
1857 const MEM_SIZE len_wanted =
1858 sizeof(STRLEN) + (size > WARNsize ? size : WARNsize);
35da51f7 1859 PERL_UNUSED_CONTEXT;
7918f24d 1860 PERL_ARGS_ASSERT_NEW_WARNINGS_BITFIELD;
72dc9ed5 1861
10edeb5d
JH
1862 buffer = (STRLEN*)
1863 (specialWARN(buffer) ?
1864 PerlMemShared_malloc(len_wanted) :
1865 PerlMemShared_realloc(buffer, len_wanted));
72dc9ed5
NC
1866 buffer[0] = size;
1867 Copy(bits, (buffer + 1), size, char);
5af88345
FC
1868 if (size < WARNsize)
1869 Zero((char *)(buffer + 1) + size, WARNsize - size, char);
72dc9ed5
NC
1870 return buffer;
1871}
f54ba1c2 1872
e6587932
DM
1873/* since we've already done strlen() for both nam and val
1874 * we can use that info to make things faster than
1875 * sprintf(s, "%s=%s", nam, val)
1876 */
1877#define my_setenv_format(s, nam, nlen, val, vlen) \
1878 Copy(nam, s, nlen, char); \
1879 *(s+nlen) = '='; \
1880 Copy(val, s+(nlen+1), vlen, char); \
1881 *(s+(nlen+1+vlen)) = '\0'
1882
c5d12488
JH
1883#ifdef USE_ENVIRON_ARRAY
1884 /* VMS' my_setenv() is in vms.c */
1885#if !defined(WIN32) && !defined(NETWARE)
8d063cd8 1886void
e1ec3a88 1887Perl_my_setenv(pTHX_ const char *nam, const char *val)
8d063cd8 1888{
27da23d5 1889 dVAR;
4efc5df6
GS
1890#ifdef USE_ITHREADS
1891 /* only parent thread can modify process environment */
1892 if (PL_curinterp == aTHX)
1893#endif
1894 {
f2517201 1895#ifndef PERL_USE_SAFE_PUTENV
50acdf95 1896 if (!PL_use_safe_putenv) {
c5d12488 1897 /* most putenv()s leak, so we manipulate environ directly */
eb578fdb
KW
1898 I32 i;
1899 const I32 len = strlen(nam);
c5d12488
JH
1900 int nlen, vlen;
1901
3a9222be
JH
1902 /* where does it go? */
1903 for (i = 0; environ[i]; i++) {
1904 if (strnEQ(environ[i],nam,len) && environ[i][len] == '=')
1905 break;
1906 }
1907
c5d12488
JH
1908 if (environ == PL_origenviron) { /* need we copy environment? */
1909 I32 j;
1910 I32 max;
1911 char **tmpenv;
1912
1913 max = i;
1914 while (environ[max])
1915 max++;
1916 tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
1917 for (j=0; j<max; j++) { /* copy environment */
1918 const int len = strlen(environ[j]);
1919 tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
1920 Copy(environ[j], tmpenv[j], len+1, char);
1921 }
1922 tmpenv[max] = NULL;
1923 environ = tmpenv; /* tell exec where it is now */
1924 }
1925 if (!val) {
1926 safesysfree(environ[i]);
1927 while (environ[i]) {
1928 environ[i] = environ[i+1];
1929 i++;
a687059c 1930 }
c5d12488
JH
1931 return;
1932 }
1933 if (!environ[i]) { /* does not exist yet */
1934 environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
1935 environ[i+1] = NULL; /* make sure it's null terminated */
1936 }
1937 else
1938 safesysfree(environ[i]);
1939 nlen = strlen(nam);
1940 vlen = strlen(val);
1941
1942 environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
1943 /* all that work just for this */
1944 my_setenv_format(environ[i], nam, nlen, val, vlen);
50acdf95 1945 } else {
c5d12488 1946# endif
739a0b84 1947# if defined(__CYGWIN__)|| defined(__SYMBIAN32__) || defined(__riscos__)
88f5bc07
AB
1948# if defined(HAS_UNSETENV)
1949 if (val == NULL) {
1950 (void)unsetenv(nam);
1951 } else {
1952 (void)setenv(nam, val, 1);
1953 }
1954# else /* ! HAS_UNSETENV */
1955 (void)setenv(nam, val, 1);
1956# endif /* HAS_UNSETENV */
47dafe4d 1957# else
88f5bc07
AB
1958# if defined(HAS_UNSETENV)
1959 if (val == NULL) {
ba88ff58
MJ
1960 if (environ) /* old glibc can crash with null environ */
1961 (void)unsetenv(nam);
88f5bc07 1962 } else {
c4420975
AL
1963 const int nlen = strlen(nam);
1964 const int vlen = strlen(val);
1965 char * const new_env =
88f5bc07
AB
1966 (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1967 my_setenv_format(new_env, nam, nlen, val, vlen);
1968 (void)putenv(new_env);
1969 }
1970# else /* ! HAS_UNSETENV */
1971 char *new_env;
c4420975
AL
1972 const int nlen = strlen(nam);
1973 int vlen;
88f5bc07
AB
1974 if (!val) {
1975 val = "";
1976 }
1977 vlen = strlen(val);
1978 new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
1979 /* all that work just for this */
1980 my_setenv_format(new_env, nam, nlen, val, vlen);
1981 (void)putenv(new_env);
1982# endif /* HAS_UNSETENV */
47dafe4d 1983# endif /* __CYGWIN__ */
50acdf95
MS
1984#ifndef PERL_USE_SAFE_PUTENV
1985 }
1986#endif
4efc5df6 1987 }
8d063cd8
LW
1988}
1989
c5d12488 1990#else /* WIN32 || NETWARE */
68dc0745
PP
1991
1992void
72229eff 1993Perl_my_setenv(pTHX_ const char *nam, const char *val)
68dc0745 1994{
27da23d5 1995 dVAR;
eb578fdb 1996 char *envstr;
c5d12488
JH
1997 const int nlen = strlen(nam);
1998 int vlen;
e6587932 1999
c5d12488
JH
2000 if (!val) {
2001 val = "";
ac5c734f 2002 }
c5d12488
JH
2003 vlen = strlen(val);
2004 Newx(envstr, nlen+vlen+2, char);
2005 my_setenv_format(envstr, nam, nlen, val, vlen);
2006 (void)PerlEnv_putenv(envstr);
2007 Safefree(envstr);
3e3baf6d
TB
2008}
2009
c5d12488 2010#endif /* WIN32 || NETWARE */
3e3baf6d 2011
739a0b84 2012#endif /* !VMS */
378cc40b 2013
16d20bd9 2014#ifdef UNLINK_ALL_VERSIONS
79072805 2015I32
6e732051 2016Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */
378cc40b 2017{
35da51f7 2018 I32 retries = 0;
378cc40b 2019
7918f24d
NC
2020 PERL_ARGS_ASSERT_UNLNK;
2021
35da51f7
AL
2022 while (PerlLIO_unlink(f) >= 0)
2023 retries++;
2024 return retries ? 0 : -1;
378cc40b
LW
2025}
2026#endif
2027
7a3f2258 2028/* this is a drop-in replacement for bcopy() */
2253333f 2029#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
378cc40b 2030char *
5aaab254 2031Perl_my_bcopy(const char *from, char *to, I32 len)
378cc40b 2032{
2d03de9c 2033 char * const retval = to;
378cc40b 2034
7918f24d
NC
2035 PERL_ARGS_ASSERT_MY_BCOPY;
2036
223f01db
KW
2037 assert(len >= 0);
2038
7c0587c8
LW
2039 if (from - to >= 0) {
2040 while (len--)
2041 *to++ = *from++;
2042 }
2043 else {
2044 to += len;
2045 from += len;
2046 while (len--)
faf8582f 2047 *(--to) = *(--from);
7c0587c8 2048 }
378cc40b
LW
2049 return retval;
2050}
ffed7fef 2051#endif
378cc40b 2052
7a3f2258 2053/* this is a drop-in replacement for memset() */
fc36a67e
PP
2054#ifndef HAS_MEMSET
2055void *
5aaab254 2056Perl_my_memset(char *loc, I32 ch, I32 len)
fc36a67e 2057{
2d03de9c 2058 char * const retval = loc;
fc36a67e 2059
7918f24d
NC
2060 PERL_ARGS_ASSERT_MY_MEMSET;
2061
223f01db
KW
2062 assert(len >= 0);
2063
fc36a67e
PP
2064 while (len--)
2065 *loc++ = ch;
2066 return retval;
2067}
2068#endif
2069
7a3f2258 2070/* this is a drop-in replacement for bzero() */
7c0587c8 2071#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
378cc40b 2072char *
5aaab254 2073Perl_my_bzero(char *loc, I32 len)
378cc40b 2074{
2d03de9c 2075 char * const retval = loc;
378cc40b 2076
7918f24d
NC
2077 PERL_ARGS_ASSERT_MY_BZERO;
2078
223f01db
KW
2079 assert(len >= 0);
2080
378cc40b
LW
2081 while (len--)
2082 *loc++ = 0;
2083 return retval;
2084}
2085#endif
7c0587c8 2086
7a3f2258 2087/* this is a drop-in replacement for memcmp() */
36477c24 2088#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
79072805 2089I32
5aaab254 2090Perl_my_memcmp(const char *s1, const char *s2, I32 len)
7c0587c8 2091{
eb578fdb
KW
2092 const U8 *a = (const U8 *)s1;
2093 const U8 *b = (const U8 *)s2;
2094 I32 tmp;
7c0587c8 2095
7918f24d
NC
2096 PERL_ARGS_ASSERT_MY_MEMCMP;
2097
223f01db
KW
2098 assert(len >= 0);
2099
7c0587c8 2100 while (len--) {
27da23d5 2101 if ((tmp = *a++ - *b++))
7c0587c8
LW
2102 return tmp;
2103 }
2104 return 0;
2105}
36477c24 2106#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
a687059c 2107
fe14fcc3 2108#ifndef HAS_VPRINTF
d05d9be5
AD
2109/* This vsprintf replacement should generally never get used, since
2110 vsprintf was available in both System V and BSD 2.11. (There may
2111 be some cross-compilation or embedded set-ups where it is needed,
2112 however.)
2113
2114 If you encounter a problem in this function, it's probably a symptom
2115 that Configure failed to detect your system's vprintf() function.
2116 See the section on "item vsprintf" in the INSTALL file.
2117
2118 This version may compile on systems with BSD-ish <stdio.h>,
2119 but probably won't on others.
2120*/
a687059c 2121
85e6fe83 2122#ifdef USE_CHAR_VSPRINTF
a687059c
LW
2123char *
2124#else
2125int
2126#endif
d05d9be5 2127vsprintf(char *dest, const char *pat, void *args)
a687059c
LW
2128{
2129 FILE fakebuf;
2130
d05d9be5
AD
2131#if defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
2132 FILE_ptr(&fakebuf) = (STDCHAR *) dest;
2133 FILE_cnt(&fakebuf) = 32767;
2134#else
2135 /* These probably won't compile -- If you really need
2136 this, you'll have to figure out some other method. */
a687059c
LW
2137 fakebuf._ptr = dest;
2138 fakebuf._cnt = 32767;
d05d9be5 2139#endif
35c8bce7
LW
2140#ifndef _IOSTRG
2141#define _IOSTRG 0
2142#endif
a687059c
LW
2143 fakebuf._flag = _IOWRT|_IOSTRG;
2144 _doprnt(pat, args, &fakebuf); /* what a kludge */
d05d9be5
AD
2145#if defined(STDIO_PTR_LVALUE)
2146 *(FILE_ptr(&fakebuf)++) = '\0';
2147#else
2148 /* PerlIO has probably #defined away fputc, but we want it here. */
2149# ifdef fputc
2150# undef fputc /* XXX Should really restore it later */
2151# endif
2152 (void)fputc('\0', &fakebuf);
2153#endif
85e6fe83 2154#ifdef USE_CHAR_VSPRINTF
a687059c
LW
2155 return(dest);
2156#else
2157 return 0; /* perl doesn't use return value */
2158#endif
2159}
2160
fe14fcc3 2161#endif /* HAS_VPRINTF */
a687059c 2162
988174c1
LW
2163/*
2164 * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
2165 * If these functions are defined,
2166 * the BYTEORDER is neither 0x1234 nor 0x4321.
2167 * However, this is not assumed.
2168 * -DWS
2169 */
2170
1109a392 2171#define HTOLE(name,type) \
988174c1 2172 type \
5aaab254 2173 name (type n) \
988174c1
LW
2174 { \
2175 union { \
2176 type value; \
2177 char c[sizeof(type)]; \
2178 } u; \
5aaab254
KW
2179 U32 i; \
2180 U32 s = 0; \
1109a392 2181 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
988174c1
LW
2182 u.c[i] = (n >> s) & 0xFF; \
2183 } \
2184 return u.value; \
2185 }
2186
1109a392 2187#define LETOH(name,type) \
988174c1 2188 type \
5aaab254 2189 name (type n) \
988174c1
LW
2190 { \
2191 union { \
2192 type value; \
2193 char c[sizeof(type)]; \
2194 } u; \
5aaab254
KW
2195 U32 i; \
2196 U32 s = 0; \
988174c1
LW
2197 u.value = n; \
2198 n = 0; \
1109a392
MHM
2199 for (i = 0; i < sizeof(u.c); i++, s += 8) { \
2200 n |= ((type)(u.c[i] & 0xFF)) << s; \
988174c1
LW
2201 } \
2202 return n; \
2203 }
2204
1109a392
MHM
2205/*
2206 * Big-endian byte order functions.
2207 */
2208
2209#define HTOBE(name,type) \
2210 type \
5aaab254 2211 name (type n) \
1109a392
MHM
2212 { \
2213 union { \
2214 type value; \
2215 char c[sizeof(type)]; \
2216 } u; \
5aaab254
KW
2217 U32 i; \
2218 U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM
2219 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2220 u.c[i] = (n >> s) & 0xFF; \
2221 } \
2222 return u.value; \
2223 }
2224
2225#define BETOH(name,type) \
2226 type \
5aaab254 2227 name (type n) \
1109a392
MHM
2228 { \
2229 union { \
2230 type value; \
2231 char c[sizeof(type)]; \
2232 } u; \
5aaab254
KW
2233 U32 i; \
2234 U32 s = 8*(sizeof(u.c)-1); \
1109a392
MHM
2235 u.value = n; \
2236 n = 0; \
2237 for (i = 0; i < sizeof(u.c); i++, s -= 8) { \
2238 n |= ((type)(u.c[i] & 0xFF)) << s; \
2239 } \
2240 return n; \
2241 }
2242
2243/*
2244 * If we just can't do it...
2245 */
2246
2247#define NOT_AVAIL(name,type) \
2248 type \
5aaab254 2249 name (type n) \
1109a392
MHM
2250 { \
2251 Perl_croak_nocontext(#name "() not available"); \
2252 return n; /* not reached */ \
2253 }
2254
2255
260c6fee 2256#if !defined(htovs)
1109a392 2257HTOLE(htovs,short)
988174c1 2258#endif
260c6fee 2259#if !defined(htovl)
1109a392 2260HTOLE(htovl,long)
988174c1 2261#endif
260c6fee 2262#if !defined(vtohs)
1109a392 2263LETOH(vtohs,short)
988174c1 2264#endif
260c6fee 2265#if !defined(vtohl)
1109a392
MHM
2266LETOH(vtohl,long)
2267#endif
2268
2269#ifdef PERL_NEED_MY_HTOLE16
2270# if U16SIZE == 2
2271HTOLE(Perl_my_htole16,U16)
2272# else
2273NOT_AVAIL(Perl_my_htole16,U16)
2274# endif
2275#endif
2276#ifdef PERL_NEED_MY_LETOH16
2277# if U16SIZE == 2
2278LETOH(Perl_my_letoh16,U16)
2279# else
2280NOT_AVAIL(Perl_my_letoh16,U16)
2281# endif
2282#endif
2283#ifdef PERL_NEED_MY_HTOBE16
2284# if U16SIZE == 2
2285HTOBE(Perl_my_htobe16,U16)
2286# else
2287NOT_AVAIL(Perl_my_htobe16,U16)
2288# endif
2289#endif
2290#ifdef PERL_NEED_MY_BETOH16
2291# if U16SIZE == 2
2292BETOH(Perl_my_betoh16,U16)
2293# else
2294NOT_AVAIL(Perl_my_betoh16,U16)
2295# endif
2296#endif
2297
2298#ifdef PERL_NEED_MY_HTOLE32
2299# if U32SIZE == 4
2300HTOLE(Perl_my_htole32,U32)
2301# else
2302NOT_AVAIL(Perl_my_htole32,U32)
2303# endif
2304#endif
2305#ifdef PERL_NEED_MY_LETOH32
2306# if U32SIZE == 4
2307LETOH(Perl_my_letoh32,U32)
2308# else
2309NOT_AVAIL(Perl_my_letoh32,U32)
2310# endif
2311#endif
2312#ifdef PERL_NEED_MY_HTOBE32
2313# if U32SIZE == 4
2314HTOBE(Perl_my_htobe32,U32)
2315# else
2316NOT_AVAIL(Perl_my_htobe32,U32)
2317# endif
2318#endif
2319#ifdef PERL_NEED_MY_BETOH32
2320# if U32SIZE == 4
2321BETOH(Perl_my_betoh32,U32)
2322# else
2323NOT_AVAIL(Perl_my_betoh32,U32)
2324# endif
2325#endif
2326
2327#ifdef PERL_NEED_MY_HTOLE64
2328# if U64SIZE == 8
2329HTOLE(Perl_my_htole64,U64)
2330# else
2331NOT_AVAIL(Perl_my_htole64,U64)
2332# endif
2333#endif
2334#ifdef PERL_NEED_MY_LETOH64
2335# if U64SIZE == 8
2336LETOH(Perl_my_letoh64,U64)
2337# else
2338NOT_AVAIL(Perl_my_letoh64,U64)
2339# endif
2340#endif
2341#ifdef PERL_NEED_MY_HTOBE64
2342# if U64SIZE == 8
2343HTOBE(Perl_my_htobe64,U64)
2344# else
2345NOT_AVAIL(Perl_my_htobe64,U64)
2346# endif
2347#endif
2348#ifdef PERL_NEED_MY_BETOH64
2349# if U64SIZE == 8
2350BETOH(Perl_my_betoh64,U64)
2351# else
2352NOT_AVAIL(Perl_my_betoh64,U64)
2353# endif
988174c1 2354#endif
a687059c 2355
1109a392
MHM
2356#ifdef PERL_NEED_MY_HTOLES
2357HTOLE(Perl_my_htoles,short)
2358#endif
2359#ifdef PERL_NEED_MY_LETOHS
2360LETOH(Perl_my_letohs,short)
2361#endif
2362#ifdef PERL_NEED_MY_HTOBES
2363HTOBE(Perl_my_htobes,short)
2364#endif
2365#ifdef PERL_NEED_MY_BETOHS
2366BETOH(Perl_my_betohs,short)
2367#endif
2368
2369#ifdef PERL_NEED_MY_HTOLEI
2370HTOLE(Perl_my_htolei,int)
2371#endif
2372#ifdef PERL_NEED_MY_LETOHI
2373LETOH(Perl_my_letohi,int)
2374#endif
2375#ifdef PERL_NEED_MY_HTOBEI
2376HTOBE(Perl_my_htobei,int)
2377#endif
2378#ifdef PERL_NEED_MY_BETOHI
2379BETOH(Perl_my_betohi,int)
2380#endif
2381
2382#ifdef PERL_NEED_MY_HTOLEL
2383HTOLE(Perl_my_htolel,long)
2384#endif
2385#ifdef PERL_NEED_MY_LETOHL
2386LETOH(Perl_my_letohl,long)
2387#endif
2388#ifdef PERL_NEED_MY_HTOBEL
2389HTOBE(Perl_my_htobel,long)
2390#endif
2391#ifdef PERL_NEED_MY_BETOHL
2392BETOH(Perl_my_betohl,long)
2393#endif
2394
2395void
2396Perl_my_swabn(void *ptr, int n)
2397{
eb578fdb
KW
2398 char *s = (char *)ptr;
2399 char *e = s + (n-1);
2400 char tc;
1109a392 2401
7918f24d
NC
2402 PERL_ARGS_ASSERT_MY_SWABN;
2403
1109a392
MHM
2404 for (n /= 2; n > 0; s++, e--, n--) {
2405 tc = *s;
2406 *s = *e;
2407 *e = tc;
2408 }
2409}
2410
4a7d1889 2411PerlIO *
c9289b7b 2412Perl_my_popen_list(pTHX_ const char *mode, int n, SV **args)
4a7d1889 2413{
739a0b84 2414#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(NETWARE) && !defined(__LIBCATAMOUNT__)
97aff369 2415 dVAR;
1f852d0d 2416 int p[2];
eb578fdb
KW
2417 I32 This, that;
2418 Pid_t pid;
1f852d0d
NIS
2419 SV *sv;
2420 I32 did_pipes = 0;
2421 int pp[2];
2422
7918f24d
NC
2423 PERL_ARGS_ASSERT_MY_POPEN_LIST;
2424
1f852d0d
NIS
2425 PERL_FLUSHALL_FOR_CHILD;
2426 This = (*mode == 'w');
2427 that = !This;
284167a5 2428 if (TAINTING_get) {
1f852d0d
NIS
2429 taint_env();
2430 taint_proper("Insecure %s%s", "EXEC");
2431 }
2432 if (PerlProc_pipe(p) < 0)
4608196e 2433 return NULL;
1f852d0d
NIS
2434 /* Try for another pipe pair for error return */
2435 if (PerlProc_pipe(pp) >= 0)
2436 did_pipes = 1;
52e18b1f 2437 while ((pid = PerlProc_fork()) < 0) {
1f852d0d
NIS
2438 if (errno != EAGAIN) {
2439 PerlLIO_close(p[This]);
4e6dfe71 2440 PerlLIO_close(p[that]);
1f852d0d
NIS
2441 if (did_pipes) {
2442 PerlLIO_close(pp[0]);
2443 PerlLIO_close(pp[1]);
2444 }
4608196e 2445 return NULL;
1f852d0d 2446 }
a2a5de95 2447 Perl_ck_warner(aTHX_ packWARN(WARN_PIPE), "Can't fork, trying again in 5 seconds");
1f852d0d
NIS
2448 sleep(5);
2449 }
2450 if (pid == 0) {
2451 /* Child */
1f852d0d
NIS
2452#undef THIS
2453#undef THAT
2454#define THIS that
2455#define THAT This
1f852d0d
NIS
2456 /* Close parent's end of error status pipe (if any) */
2457 if (did_pipes) {
2458 PerlLIO_close(pp[0]);
2459#if defined(HAS_FCNTL) && defined(F_SETFD)
2460 /* Close error pipe automatically if exec works */
2461 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2462#endif
2463 }
2464 /* Now dup our end of _the_ pipe to right position */
2465 if (p[THIS] != (*mode == 'r')) {
2466 PerlLIO_dup2(p[THIS], *mode == 'r');
2467 PerlLIO_close(p[THIS]);
4e6dfe71
GS
2468 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2469 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d 2470 }
4e6dfe71
GS
2471 else
2472 PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
1f852d0d
NIS
2473#if !defined(HAS_FCNTL) || !defined(F_SETFD)
2474 /* No automatic close - do it by hand */
b7953727
JH
2475# ifndef NOFILE
2476# define NOFILE 20
2477# endif
a080fe3d
NIS
2478 {
2479 int fd;
2480
2481 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
3aed30dc 2482 if (fd != pp[1])
a080fe3d
NIS
2483 PerlLIO_close(fd);
2484 }
1f852d0d
NIS
2485 }
2486#endif
a0714e2c 2487 do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes);
1f852d0d
NIS
2488 PerlProc__exit(1);
2489#undef THIS
2490#undef THAT
2491 }
2492 /* Parent */
52e18b1f 2493 do_execfree(); /* free any memory malloced by child on fork */
1f852d0d
NIS
2494 if (did_pipes)
2495 PerlLIO_close(pp[1]);
2496 /* Keep the lower of the two fd numbers */
2497 if (p[that] < p[This]) {
2498 PerlLIO_dup2(p[This], p[that]);
2499 PerlLIO_close(p[This]);
2500 p[This] = p[that];
2501 }
4e6dfe71
GS
2502 else
2503 PerlLIO_close(p[that]); /* close child's end of pipe */
2504
1f852d0d 2505 sv = *av_fetch(PL_fdpid,p[This],TRUE);
862a34c6 2506 SvUPGRADE(sv,SVt_IV);
45977657 2507 SvIV_set(sv, pid);
1f852d0d
NIS
2508 PL_forkprocess = pid;
2509 /* If we managed to get status pipe check for exec fail */
2510 if (did_pipes && pid > 0) {
2511 int errkid;
bb7a0f54
MHM
2512 unsigned n = 0;
2513 SSize_t n1;
1f852d0d
NIS
2514
2515 while (n < sizeof(int)) {
2516 n1 = PerlLIO_read(pp[0],
2517 (void*)(((char*)&errkid)+n),
2518 (sizeof(int)) - n);
2519 if (n1 <= 0)
2520 break;
2521 n += n1;
2522 }
2523 PerlLIO_close(pp[0]);
2524 did_pipes = 0;
2525 if (n) { /* Error */
2526 int pid2, status;
8c51524e 2527 PerlLIO_close(p[This]);
1f852d0d 2528 if (n != sizeof(int))
5637ef5b 2529 Perl_croak(aTHX_ "panic: kid popen errno read, n=%u", n);
1f852d0d
NIS
2530 do {
2531 pid2 = wait4pid(pid, &status, 0);
2532 } while (pid2 == -1 && errno == EINTR);
2533 errno = errkid; /* Propagate errno from kid */
4608196e 2534 return NULL;
1f852d0d
NIS
2535 }
2536 }
2537 if (did_pipes)
2538 PerlLIO_close(pp[0]);
2539 return PerlIO_fdopen(p[This], mode);
2540#else
9d419b5f 2541# ifdef OS2 /* Same, without fork()ing and all extra overhead... */
4e205ed6 2542 return my_syspopen4(aTHX_ NULL, mode, n, args);
9d419b5f 2543# else
4a7d1889
NIS
2544 Perl_croak(aTHX_ "List form of piped open not implemented");
2545 return (PerlIO *) NULL;
9d419b5f 2546# endif
1f852d0d 2547#endif
4a7d1889
NIS
2548}
2549
5f05dabc 2550 /* VMS' my_popen() is in VMS.c, same with OS/2. */
739a0b84 2551#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__LIBCATAMOUNT__)
760ac839 2552PerlIO *
3dd43144 2553Perl_my_popen(pTHX_ const char *cmd, const char *mode)
a687059c 2554{
97aff369 2555 dVAR;
a687059c 2556 int p[2];
eb578fdb
KW
2557 I32 This, that;
2558 Pid_t pid;
79072805 2559 SV *sv;
bfce84ec 2560 const I32 doexec = !(*cmd == '-' && cmd[1] == '\0');
e446cec8
IZ
2561 I32 did_pipes = 0;
2562 int pp[2];
a687059c 2563
7918f24d
NC
2564 PERL_ARGS_ASSERT_MY_POPEN;
2565
45bc9206 2566 PERL_FLUSHALL_FOR_CHILD;
ddcf38b7
IZ
2567#ifdef OS2
2568 if (doexec) {
23da6c43 2569 return my_syspopen(aTHX_ cmd,mode);
ddcf38b7 2570 }
a1d180c4 2571#endif
8ac85365
NIS
2572 This = (*mode == 'w');
2573 that = !This;
284167a5 2574 if (doexec && TAINTING_get) {
bbce6d69
PP
2575 taint_env();
2576 taint_proper("Insecure %s%s", "EXEC");
d48672a2 2577 }
c2267164 2578 if (PerlProc_pipe(p) < 0)
4608196e 2579 return NULL;
e446cec8
IZ
2580 if (doexec && PerlProc_pipe(pp) >= 0)
2581 did_pipes = 1;
52e18b1f 2582 while ((pid = PerlProc_fork()) < 0) {
a687059c 2583 if (errno != EAGAIN) {
6ad3d225 2584 PerlLIO_close(p[This]);
b5ac89c3 2585 PerlLIO_close(p[that]);
e446cec8
IZ
2586 if (did_pipes) {
2587 PerlLIO_close(pp[0]);
2588 PerlLIO_close(pp[1]);
2589 }
a687059c 2590 if (!doexec)
b3647a36 2591 Perl_croak(aTHX_ "Can't fork: %s", Strerror(errno));
4608196e 2592 return NULL;
a687059c 2593 }
a2a5de95 2594 Perl_ck_warner(aTHX_ packWARN(WARN_PIPE), "Can't fork, trying again in 5 seconds");
a687059c
LW
2595 sleep(5);
2596 }
2597 if (pid == 0) {
79072805 2598
30ac6d9b
GS
2599#undef THIS
2600#undef THAT
a687059c 2601#define THIS that
8ac85365 2602#define THAT This
e446cec8
IZ
2603 if (did_pipes) {
2604 PerlLIO_close(pp[0]);
2605#if defined(HAS_FCNTL) && defined(F_SETFD)
2606 fcntl(pp[1], F_SETFD, FD_CLOEXEC);
2607#endif
2608 }
a687059c 2609 if (p[THIS] != (*mode == 'r')) {
6ad3d225
GS
2610 PerlLIO_dup2(p[THIS], *mode == 'r');
2611 PerlLIO_close(p[THIS]);
b5ac89c3
NIS
2612 if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
2613 PerlLIO_close(p[THAT]);
a687059c 2614 }
b5ac89c3
NIS
2615 else
2616 PerlLIO_close(p[THAT]);
4435c477 2617#ifndef OS2
a687059c 2618 if (doexec) {
a0d0e21e 2619#if !defined(HAS_FCNTL) || !defined(F_SETFD)
ae986130
LW
2620#ifndef NOFILE
2621#define NOFILE 20
2622#endif
a080fe3d 2623 {
3aed30dc 2624 int fd;
a080fe3d
NIS
2625
2626 for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
2627 if (fd != pp[1])
3aed30dc 2628 PerlLIO_close(fd);
a080fe3d 2629 }
ae986130 2630#endif
a080fe3d
NIS
2631 /* may or may not use the shell */
2632 do_exec3(cmd, pp[1], did_pipes);
6ad3d225 2633 PerlProc__exit(1);
a687059c 2634 }
4435c477 2635#endif /* defined OS2 */
713cef20
IZ
2636
2637#ifdef PERLIO_USING_CRLF
2638 /* Since we circumvent IO layers when we manipulate low-level
2639 filedescriptors directly, need to manually switch to the
2640 default, binary, low-level mode; see PerlIOBuf_open(). */
2641 PerlLIO_setmode((*mode == 'r'), O_BINARY);
2642#endif
3280af22 2643 PL_forkprocess = 0;
ca0c25f6 2644#ifdef PERL_USES_PL_PIDSTATUS
3280af22 2645 hv_clear(PL_pidstatus); /* we have no children */
ca0c25f6 2646#endif
4608196e 2647 return NULL;
a687059c
LW
2648#undef THIS
2649#undef THAT
2650 }
b5ac89c3 2651 do_execfree(); /* free any memory malloced by child on vfork */
e446cec8
IZ
2652 if (did_pipes)
2653 PerlLIO_close(pp[1]);
8ac85365 2654 if (p[that] < p[This]) {
6ad3d225
GS
2655 PerlLIO_dup2(p[This], p[that]);
2656 PerlLIO_close(p[This]);
8ac85365 2657 p[This] = p[that];
62b28dd9 2658 }
b5ac89c3
NIS
2659 else
2660 PerlLIO_close(p[that]);
2661
3280af22 2662 sv = *av_fetch(PL_fdpid,p[This],TRUE);
862a34c6 2663 SvUPGRADE(sv,SVt_IV);
45977657 2664 SvIV_set(sv, pid);
3280af22 2665 PL_forkprocess = pid;
e446cec8
IZ
2666 if (did_pipes && pid > 0) {
2667 int errkid;
bb7a0f54
MHM
2668 unsigned n = 0;
2669 SSize_t n1;
e446cec8
IZ
2670
2671 while (n < sizeof(int)) {
2672 n1 = PerlLIO_read(pp[0],
2673 (void*)(((char*)&errkid)+n),
2674 (sizeof(int)) - n);
2675 if (n1 <= 0)
2676 break;
2677 n += n1;
2678 }
2f96c702
IZ
2679 PerlLIO_close(pp[0]);
2680 did_pipes = 0;
e446cec8 2681 if (n) { /* Error */
faa466a7 2682 int pid2, status;
8c51524e 2683 PerlLIO_close(p[This]);
e446cec8 2684 if (n != sizeof(int))
5637ef5b 2685 Perl_croak(aTHX_ "panic: kid popen errno read, n=%u", n);
faa466a7
RG
2686 do {
2687 pid2 = wait4pid(pid, &status, 0);
2688 } while (pid2 == -1 && errno == EINTR);
e446cec8 2689 errno = errkid; /* Propagate errno from kid */
4608196e 2690 return NULL;
e446cec8
IZ
2691 }
2692 }
2693 if (did_pipes)
2694 PerlLIO_close(pp[0]);
8ac85365 2695 return PerlIO_fdopen(p[This], mode);
a687059c 2696}
7c0587c8 2697#else
2b96b0a5
JH
2698#if defined(DJGPP)
2699FILE *djgpp_popen();
2700PerlIO *
cef6ea9d 2701Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2b96b0a5
JH
2702{
2703 PERL_FLUSHALL_FOR_CHILD;
2704 /* Call system's popen() to get a FILE *, then import it.
2705 used 0 for 2nd parameter to PerlIO_importFILE;
2706 apparently not used
2707 */
2708 return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
2709}
9c12f1e5
RGS
2710#else
2711#if defined(__LIBCATAMOUNT__)
2712PerlIO *
2713Perl_my_popen(pTHX_ const char *cmd, const char *mode)
2714{
2715 return NULL;
2716}
2717#endif
2b96b0a5 2718#endif
7c0587c8
LW
2719
2720#endif /* !DOSISH */
a687059c 2721
52e18b1f
GS
2722/* this is called in parent before the fork() */
2723void
2724Perl_atfork_lock(void)
2725{
27da23d5 2726 dVAR;
3db8f154 2727#if defined(USE_ITHREADS)
52e18b1f 2728 /* locks must be held in locking order (if any) */
4da80956
P
2729# ifdef USE_PERLIO
2730 MUTEX_LOCK(&PL_perlio_mutex);
2731# endif
52e18b1f
GS
2732# ifdef MYMALLOC
2733 MUTEX_LOCK(&PL_malloc_mutex);
2734# endif
2735 OP_REFCNT_LOCK;
2736#endif
2737}
2738
2739/* this is called in both parent and child after the fork() */
2740void
2741Perl_atfork_unlock(void)
2742{
27da23d5 2743 dVAR;
3db8f154 2744#if defined(USE_ITHREADS)
52e18b1f 2745 /* locks must be released in same order as in atfork_lock() */
4da80956
P
2746# ifdef USE_PERLIO
2747 MUTEX_UNLOCK(&PL_perlio_mutex);
2748# endif
52e18b1f
GS
2749# ifdef MYMALLOC
2750 MUTEX_UNLOCK(&PL_malloc_mutex);
2751# endif
2752 OP_REFCNT_UNLOCK;
2753#endif
2754}
2755
2756Pid_t
2757Perl_my_fork(void)
2758{
2759#if defined(HAS_FORK)
2760 Pid_t pid;
3db8f154 2761#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
52e18b1f
GS
2762 atfork_lock();
2763 pid = fork();
2764 atfork_unlock();
2765#else
2766 /* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
2767 * handlers elsewhere in the code */
2768 pid = fork();
2769#endif
2770 return pid;
2771#else
2772 /* this "canna happen" since nothing should be calling here if !HAS_FORK */
2773 Perl_croak_nocontext("fork() not available");
b961a566 2774 return 0;
52e18b1f
GS
2775#endif /* HAS_FORK */
2776}
2777
748a9306 2778#ifdef DUMP_FDS
35ff7856 2779void
c9289b7b 2780Perl_dump_fds(pTHX_ const char *const s)
ae986130
LW
2781{
2782 int fd;
c623ac67 2783 Stat_t tmpstatbuf;
ae986130 2784
7918f24d
NC
2785 PERL_ARGS_ASSERT_DUMP_FDS;
2786
bf49b057 2787 PerlIO_printf(Perl_debug_log,"%s", s);
ae986130 2788 for (fd = 0; fd < 32; fd++) {
6ad3d225 2789 if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
bf49b057 2790 PerlIO_printf(Perl_debug_log," %d",fd);
ae986130 2791 }
bf49b057 2792 PerlIO_printf(Perl_debug_log,"\n");
27da23d5 2793 return;
ae986130 2794}
35ff7856 2795#endif /* DUMP_FDS */
ae986130 2796
fe14fcc3 2797#ifndef HAS_DUP2
fec02dd3 2798int
ba106d47 2799dup2(int oldfd, int newfd)
a687059c 2800{
a0d0e21e 2801#if defined(HAS_FCNTL) && defined(F_DUPFD)
fec02dd3
AD
2802 if (oldfd == newfd)
2803 return oldfd;
6ad3d225 2804 PerlLIO_close(newfd);
fec02dd3 2805 return fcntl(oldfd, F_DUPFD, newfd);
62b28dd9 2806#else
fc36a67e
PP
2807#define DUP2_MAX_FDS 256
2808 int fdtmp[DUP2_MAX_FDS];
79072805 2809 I32 fdx = 0;
ae986130
LW
2810 int fd;
2811
fe14fcc3 2812 if (oldfd == newfd)
fec02dd3 2813 return oldfd;
6ad3d225 2814 PerlLIO_close(newfd);
fc36a67e 2815 /* good enough for low fd's... */
6ad3d225 2816 while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
fc36a67e 2817 if (fdx >= DUP2_MAX_FDS) {
6ad3d225 2818 PerlLIO_close(fd);
fc36a67e
PP
2819 fd = -1;
2820 break;
2821 }
ae986130 2822 fdtmp[fdx++] = fd;
fc36a67e 2823 }
ae986130 2824 while (fdx > 0)
6ad3d225 2825 PerlLIO_close(fdtmp[--fdx]);
fec02dd3 2826 return fd;
62b28dd9 2827#endif
a687059c
LW
2828}
2829#endif
2830
64ca3a65 2831#ifndef PERL_MICRO
ff68c719
PP
2832#ifdef HAS_SIGACTION
2833
2834Sighandler_t
864dbfa3 2835Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2836{
27da23d5 2837 dVAR;
ff68c719
PP
2838 struct sigaction act, oact;
2839
a10b1e10
JH
2840#ifdef USE_ITHREADS
2841 /* only "parent" interpreter can diddle signals */
2842 if (PL_curinterp != aTHX)
8aad04aa 2843 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2844#endif
2845
8aad04aa 2846 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2847 sigemptyset(&act.sa_mask);
2848 act.sa_flags = 0;
2849#ifdef SA_RESTART
4ffa73a3
JH
2850 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2851 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2852#endif
358837b8 2853#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2854 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2855 act.sa_flags |= SA_NOCLDWAIT;
2856#endif
ff68c719 2857 if (sigaction(signo, &act, &oact) == -1)
8aad04aa 2858 return (Sighandler_t) SIG_ERR;
ff68c719 2859 else
8aad04aa 2860 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2861}
2862
2863Sighandler_t
864dbfa3 2864Perl_rsignal_state(pTHX_ int signo)
ff68c719
PP
2865{
2866 struct sigaction oact;
96a5add6 2867 PERL_UNUSED_CONTEXT;
ff68c719
PP
2868
2869 if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
8aad04aa 2870 return (Sighandler_t) SIG_ERR;
ff68c719 2871 else
8aad04aa 2872 return (Sighandler_t) oact.sa_handler;
ff68c719
PP
2873}
2874
2875int
864dbfa3 2876Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2877{
27da23d5 2878 dVAR;
ff68c719
PP
2879 struct sigaction act;
2880
7918f24d
NC
2881 PERL_ARGS_ASSERT_RSIGNAL_SAVE;
2882
a10b1e10
JH
2883#ifdef USE_ITHREADS
2884 /* only "parent" interpreter can diddle signals */
2885 if (PL_curinterp != aTHX)
2886 return -1;
2887#endif
2888
8aad04aa 2889 act.sa_handler = (void(*)(int))handler;
ff68c719
PP
2890 sigemptyset(&act.sa_mask);
2891 act.sa_flags = 0;
2892#ifdef SA_RESTART
4ffa73a3
JH
2893 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
2894 act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
0a8e0eff 2895#endif
36b5d377 2896#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
8aad04aa 2897 if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN)
85264bed
CS
2898 act.sa_flags |= SA_NOCLDWAIT;
2899#endif
ff68c719
PP
2900 return sigaction(signo, &act, save);
2901}
2902
2903int
864dbfa3 2904Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2905{
27da23d5 2906 dVAR;
a10b1e10
JH
2907#ifdef USE_ITHREADS
2908 /* only "parent" interpreter can diddle signals */
2909 if (PL_curinterp != aTHX)
2910 return -1;
2911#endif
2912
ff68c719
PP
2913 return sigaction(signo, save, (struct sigaction *)NULL);
2914}
2915
2916#else /* !HAS_SIGACTION */
2917
2918Sighandler_t
864dbfa3 2919Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
ff68c719 2920{
39f1703b 2921#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2922 /* only "parent" interpreter can diddle signals */
2923 if (PL_curinterp != aTHX)
8aad04aa 2924 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2925#endif
2926
6ad3d225 2927 return PerlProc_signal(signo, handler);
ff68c719
PP
2928}
2929
fabdb6c0 2930static Signal_t
4e35701f 2931sig_trap(int signo)
ff68c719 2932{
27da23d5
JH
2933 dVAR;
2934 PL_sig_trapped++;
ff68c719
PP
2935}
2936
2937Sighandler_t
864dbfa3 2938Perl_rsignal_state(pTHX_ int signo)
ff68c719 2939{
27da23d5 2940 dVAR;
ff68c719
PP
2941 Sighandler_t oldsig;
2942
39f1703b 2943#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2944 /* only "parent" interpreter can diddle signals */
2945 if (PL_curinterp != aTHX)
8aad04aa 2946 return (Sighandler_t) SIG_ERR;
a10b1e10
JH
2947#endif
2948
27da23d5 2949 PL_sig_trapped = 0;
6ad3d225
GS
2950 oldsig = PerlProc_signal(signo, sig_trap);
2951 PerlProc_signal(signo, oldsig);
27da23d5 2952 if (PL_sig_trapped)
3aed30dc 2953 PerlProc_kill(PerlProc_getpid(), signo);
ff68c719
PP
2954 return oldsig;
2955}
2956
2957int
864dbfa3 2958Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
ff68c719 2959{
39f1703b 2960#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2961 /* only "parent" interpreter can diddle signals */
2962 if (PL_curinterp != aTHX)
2963 return -1;
2964#endif
6ad3d225 2965 *save = PerlProc_signal(signo, handler);
8aad04aa 2966 return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2967}
2968
2969int
864dbfa3 2970Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
ff68c719 2971{
39f1703b 2972#if defined(USE_ITHREADS) && !defined(WIN32)
a10b1e10
JH
2973 /* only "parent" interpreter can diddle signals */
2974 if (PL_curinterp != aTHX)
2975 return -1;
2976#endif
8aad04aa 2977 return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0;
ff68c719
PP
2978}
2979
2980#endif /* !HAS_SIGACTION */
64ca3a65 2981#endif /* !PERL_MICRO */
ff68c719 2982
5f05dabc 2983 /* VMS' my_pclose() is in VMS.c; same with OS/2 */
739a0b84 2984#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__LIBCATAMOUNT__)
79072805 2985I32
864dbfa3 2986Perl_my_pclose(pTHX_ PerlIO *ptr)
a687059c 2987{
97aff369 2988 dVAR;
ff68c719 2989 Sigsave_t hstat, istat, qstat;
a687059c 2990 int status;
a0d0e21e 2991 SV **svp;
d8a83dd3 2992 Pid_t pid;
2e0cfa16 2993 Pid_t pid2 = 0;
03136e13 2994 bool close_failed;
4ee39169 2995 dSAVEDERRNO;
2e0cfa16
FC
2996 const int fd = PerlIO_fileno(ptr);
2997
b6ae43b7 2998#ifdef USE_PERLIO
2e0cfa16
FC
2999 /* Find out whether the refcount is low enough for us to wait for the
3000 child proc without blocking. */
3001 const bool should_wait = PerlIOUnix_refcnt(fd) == 1;
b6ae43b7
NC
3002#else
3003 const bool should_wait = 1;
3004#endif
a687059c 3005
2e0cfa16 3006 svp = av_fetch(PL_fdpid,fd,TRUE);
25d92023 3007 pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
a0d0e21e 3008 SvREFCNT_dec(*svp);
3280af22 3009 *svp = &PL_sv_undef;
ddcf38b7
IZ
3010#ifdef OS2
3011 if (pid == -1) { /* Opened by popen. */
3012 return my_syspclose(ptr);
3013 }
a1d180c4 3014#endif
f1618b10
CS
3015 close_failed = (PerlIO_close(ptr) == EOF);
3016 SAVE_ERRNO;
64ca3a65 3017#ifndef PERL_MICRO
8aad04aa
JH
3018 rsignal_save(SIGHUP, (Sighandler_t) SIG_IGN, &hstat);
3019 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &istat);
3020 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qstat);
64ca3a65 3021#endif
2e0cfa16 3022 if (should_wait) do {
1d3434b8
GS
3023 pid2 = wait4pid(pid, &status, 0);
3024 } while (pid2 == -1 && errno == EINTR);
64ca3a65 3025#ifndef PERL_MICRO
ff68c719
PP
3026 rsignal_restore(SIGHUP, &hstat);
3027 rsignal_restore(SIGINT, &istat);
3028 rsignal_restore(SIGQUIT, &qstat);
64ca3a65 3029#endif
03136e13 3030 if (close_failed) {
4ee39169 3031 RESTORE_ERRNO;
03136e13
CS
3032 return -1;
3033 }
2e0cfa16
FC
3034 return(
3035 should_wait
3036 ? pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status)
3037 : 0
3038 );
20188a90 3039}
9c12f1e5
RGS
3040#else
3041#if defined(__LIBCATAMOUNT__)
3042I32
3043Perl_my_pclose(pTHX_ PerlIO *ptr)
3044{
3045 return -1;
3046}
3047#endif
4633a7c4
LW
3048#endif /* !DOSISH */
3049
e37778c2 3050#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(__LIBCATAMOUNT__)
79072805 3051I32
d8a83dd3 3052Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
20188a90 3053{
97aff369 3054 dVAR;
27da23d5 3055 I32 result = 0;
7918f24d 3056 PERL_ARGS_ASSERT_WAIT4PID;
b7953727
JH
3057 if (!pid)
3058 return -1;
ca0c25f6 3059#ifdef PERL_USES_PL_PIDSTATUS
b7953727 3060 {
3aed30dc 3061 if (pid > 0) {
12072db5
NC
3062 /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the
3063 pid, rather than a string form. */
c4420975 3064 SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE);
3aed30dc
HS
3065 if (svp && *svp != &PL_sv_undef) {
3066 *statusp = SvIVX(*svp);
12072db5
NC
3067 (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),
3068 G_DISCARD);
3aed30dc
HS
3069 return pid;
3070 }
3071 }
3072 else {
3073 HE *entry;
3074
3075 hv_iterinit(PL_pidstatus);
3076 if ((entry = hv_iternext(PL_pidstatus))) {
c4420975 3077 SV * const sv = hv_iterval(PL_pidstatus,entry);
7ea75b61 3078 I32 len;
0bcc34c2 3079 const char * const spid = hv_iterkey(entry,&len);
27da23d5 3080
12072db5
NC
3081 assert (len == sizeof(Pid_t));
3082 memcpy((char *)&pid, spid, len);
3aed30dc 3083 *statusp = SvIVX(sv);
7b9a3241
NC
3084 /* The hash iterator is currently on this entry, so simply
3085 calling hv_delete would trigger the lazy delete, which on
3086 aggregate does more work, beacuse next call to hv_iterinit()
3087 would spot the flag, and have to call the delete routine,
3088 while in the meantime any new entries can't re-use that
3089 memory. */
3090 hv_iterinit(PL_pidstatus);
7ea75b61 3091 (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD);
3aed30dc
HS
3092 return pid;
3093 }
20188a90
LW
3094 }
3095 }
68a29c53 3096#endif
79072805 3097#ifdef HAS_WAITPID
367f3c24
IZ
3098# ifdef HAS_WAITPID_RUNTIME
3099 if (!HAS_WAITPID_RUNTIME)
3100 goto hard_way;
3101# endif
cddd4526 3102 result = PerlProc_waitpid(pid,statusp,flags);
dfcfdb64 3103 goto finish;
367f3c24
IZ
3104#endif
3105#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
4608196e 3106 result = wait4((pid==-1)?0:pid,statusp,flags,NULL);
dfcfdb64 3107 goto finish;
367f3c24 3108#endif
ca0c25f6 3109#ifdef PERL_USES_PL_PIDSTATUS
27da23d5 3110#if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME)
367f3c24 3111 hard_way:
27da23d5 3112#endif
a0d0e21e 3113 {
a0d0e21e 3114 if (flags)
cea2e8a9 3115 Perl_croak(aTHX_ "Can't do waitpid with flags");
a0d0e21e 3116 else {
76e3520e 3117 while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
a0d0e21e
LW
3118 pidgone(result,*statusp);
3119 if (result < 0)
3120 *statusp = -1;
3121 }
a687059c
LW
3122 }
3123#endif
27da23d5 3124#if defined(HAS_WAITPID) || defined(HAS_WAIT4)
dfcfdb64 3125 finish:
27da23d5 3126#endif
cddd4526
NIS
3127 if (result < 0 && errno == EINTR) {
3128 PERL_ASYNC_CHECK();
48dbb59e 3129 errno = EINTR; /* reset in case a signal handler changed $! */
cddd4526
NIS
3130 }
3131 return result;
a687059c 3132}
2986a63f 3133#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
a687059c 3134
ca0c25f6 3135#ifdef PERL_USES_PL_PIDSTATUS
7c0587c8 3136void
ed4173ef 3137S_pidgone(pTHX_ Pid_t pid, int status)
a687059c 3138{
eb578fdb 3139 SV *sv;
a687059c 3140
12072db5 3141 sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE);
862a34c6 3142 SvUPGRADE(sv,SVt_IV);
45977657 3143 SvIV_set(sv, status);
20188a90 3144 return;
a687059c 3145}
ca0c25f6 3146#endif
a687059c 3147
739a0b84 3148#if defined(OS2)
7c0587c8 3149int pclose();
ddcf38b7
IZ
3150#ifdef HAS_FORK
3151int /* Cannot prototype with I32
3152 in os2ish.h. */
ba106d47 3153my_syspclose(PerlIO *ptr)
ddcf38b7 3154#else
79072805 3155I32
864dbfa3 3156Perl_my_pclose(pTHX_ PerlIO *ptr)
a1d180c4 3157#endif
a687059c 3158{
760ac839 3159 /* Needs work for PerlIO ! */
c4420975 3160 FILE * const f = PerlIO_findFILE(ptr);
7452cf6a 3161 const I32 result = pclose(f);
2b96b0a5
JH
3162 PerlIO_releaseFILE(ptr,f);
3163 return result;
3164}
3165#endif
3166
933fea7f 3167#if defined(DJGPP)
2b96b0a5
JH
3168int djgpp_pclose();
3169I32
3170Perl_my_pclose(pTHX_ PerlIO *ptr)
3171{
3172 /* Needs work for PerlIO ! */
c4420975 3173 FILE * const f = PerlIO_findFILE(ptr);
2b96b0a5 3174 I32 result = djgpp_pclose(f);
933fea7f 3175 result = (result << 8) & 0xff00;
760ac839
LW
3176 PerlIO_releaseFILE(ptr,f);
3177 return result;
a687059c 3178}
7c0587c8 3179#endif
9f68db38 3180
16fa5c11 3181#define PERL_REPEATCPY_LINEAR 4
9f68db38 3182void
5aaab254 3183Perl_repeatcpy(char *to, const char *from, I32 len, IV count)
9f68db38 3184{
7918f24d
NC
3185 PERL_ARGS_ASSERT_REPEATCPY;
3186
223f01db
KW
3187 assert(len >= 0);
3188
2709980d 3189 if (count < 0)
43387ee1 3190 Perl_croak_memory_wrap();
2709980d 3191
16fa5c11
VP
3192 if (len == 1)
3193 memset(to, *from, count);
3194 else if (count) {
eb578fdb 3195 char *p = to;
26e1303d 3196 IV items, linear, half;
16fa5c11
VP
3197
3198 linear = count < PERL_REPEATCPY_LINEAR ? count : PERL_REPEATCPY_LINEAR;
3199 for (items = 0; items < linear; ++items) {
eb578fdb 3200 const char *q = from;
26e1303d 3201 IV todo;
16fa5c11
VP
3202 for (todo = len; todo > 0; todo--)
3203 *p++ = *q++;
3204 }
3205
3206 half = count / 2;
3207 while (items <= half) {
26e1303d 3208 IV size = items * len;
16fa5c11
VP
3209 memcpy(p, to, size);
3210 p += size;
3211 items *= 2;
9f68db38 3212 }
16fa5c11
VP
3213
3214 if (count > items)
3215 memcpy(p, to, (count - items) * len);
9f68db38
LW
3216 }
3217}
0f85fab0 3218
fe14fcc3 3219#ifndef HAS_RENAME
79072805 3220I32
4373e329 3221Perl_same_dirent(pTHX_ const char *a, const char *b)
62b28dd9 3222{
93a17b20
LW
3223 char *fa = strrchr(a,'/');
3224 char *fb = strrchr(b,'/');
c623ac67
GS
3225 Stat_t tmpstatbuf1;
3226 Stat_t tmpstatbuf2;
c4420975 3227 SV * const tmpsv = sv_newmortal();
62b28dd9 3228
7918f24d
NC
3229 PERL_ARGS_ASSERT_SAME_DIRENT;
3230
62b28dd9
LW
3231 if (fa)
3232 fa++;
3233 else
3234 fa = a;
3235 if (fb)
3236 fb++;
3237 else
3238 fb = b;
3239 if (strNE(a,b))
3240 return FALSE;
3241 if (fa == a)
76f68e9b 3242 sv_setpvs(tmpsv, ".");
62b28dd9 3243 else
46fc3d4c 3244 sv_setpvn(tmpsv, a, fa - a);
95a20fc0 3245 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0)
62b28dd9
LW
3246 return FALSE;
3247 if (fb == b)
76f68e9b 3248 sv_setpvs(tmpsv, ".");
62b28dd9 3249 else
46fc3d4c 3250 sv_setpvn(tmpsv, b, fb - b);
95a20fc0 3251 if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0)
62b28dd9
LW
3252 return FALSE;
3253 return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
3254 tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
3255}
fe14fcc3
LW
3256#endif /* !HAS_RENAME */
3257
491527d0 3258char*
7f315aed
NC
3259Perl_find_script(pTHX_ const char *scriptname, bool dosearch,
3260 const char *const *const search_ext, I32 flags)
491527d0 3261{
97aff369 3262 dVAR;
bd61b366
SS
3263 const char *xfound = NULL;
3264 char *xfailed = NULL;
0f31cffe 3265 char tmpbuf[MAXPATHLEN];
eb578fdb 3266 char *s;
5f74f29c 3267 I32 len = 0;
491527d0 3268 int retval;
39a02377 3269 char *bufend;
7c458fae 3270#if defined(DOSISH) && !defined(OS2)
491527d0
GS
3271# define SEARCH_EXTS ".bat", ".cmd", NULL
3272# define MAX_EXT_LEN 4
3273#endif
3274#ifdef OS2
3275# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
3276# define MAX_EXT_LEN 4
3277#endif
3278#ifdef VMS
3279# define SEARCH_EXTS ".pl", ".com", NULL
3280# define MAX_EXT_LEN 4
3281#endif
3282 /* additional extensions to try in each dir if scriptname not found */
3283#ifdef SEARCH_EXTS
0bcc34c2 3284 static const char *const exts[] = { SEARCH_EXTS };
7f315aed 3285 const char *const *const ext = search_ext ? search_ext : exts;
491527d0 3286 int extidx = 0, i = 0;
bd61b366 3287 const char *curext = NULL;
491527d0 3288#else
53c1dcc0 3289 PERL_UNUSED_ARG(search_ext);
491527d0
GS
3290# define MAX_EXT_LEN 0
3291#endif
3292
7918f24d
NC
3293 PERL_ARGS_ASSERT_FIND_SCRIPT;
3294
491527d0
GS
3295 /*
3296 * If dosearch is true and if scriptname does not contain path
3297 * delimiters, search the PATH for scriptname.
3298 *
3299 * If SEARCH_EXTS is also defined, will look for each
3300 * scriptname{SEARCH_EXTS} whenever scriptname is not found
3301 * while searching the PATH.
3302 *
3303 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
3304 * proceeds as follows:
3305 * If DOSISH or VMSISH:
3306 * + look for ./scriptname{,.foo,.bar}
3307 * + search the PATH for scriptname{,.foo,.bar}
3308 *
3309 * If !DOSISH:
3310 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
3311 * this will not look in '.' if it's not in the PATH)
3312 */
84486fc6 3313 tmpbuf[0] = '\0';
491527d0
GS
3314
3315#ifdef VMS
3316# ifdef ALWAYS_DEFTYPES
3317 len = strlen(scriptname);
3318 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
c4420975 3319 int idx = 0, deftypes = 1;
491527d0
GS
3320 bool seen_dot = 1;
3321
bd61b366 3322 const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL);
491527d0
GS
3323# else
3324 if (dosearch) {
c4420975 3325 int idx = 0, deftypes = 1;
491527d0
GS
3326 bool seen_dot = 1;
3327
bd61b366 3328 const int hasdir = (strpbrk(scriptname,":[</") != NULL);
491527d0
GS
3329# endif
3330 /* The first time through, just add SEARCH_EXTS to whatever we
3331 * already have, so we can check for default file types. */
3332 while (deftypes ||
84486fc6 3333 (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
491527d0
GS
3334 {
3335 if (deftypes) {
3336 deftypes = 0;
84486fc6 3337 *tmpbuf = '\0';
491527d0 3338 }
84486fc6
GS
3339 if ((strlen(tmpbuf) + strlen(scriptname)
3340 + MAX_EXT_LEN) >= sizeof tmpbuf)
491527d0 3341 continue; /* don't search dir with too-long name */
6fca0082 3342 my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf));
491527d0
GS
3343#else /* !VMS */
3344
3345#ifdef DOSISH
3346 if (strEQ(scriptname, "-"))
3347 dosearch = 0;
3348 if (dosearch) { /* Look in '.' first. */
fe2774ed 3349 const char *cur = scriptname;
491527d0
GS
3350#ifdef SEARCH_EXTS
3351 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
3352 while (ext[i])
3353 if (strEQ(ext[i++],curext)) {
3354 extidx = -1; /* already has an ext */
3355 break;
3356 }
3357 do {
3358#endif
3359 DEBUG_p(PerlIO_printf(Perl_debug_log,
3360 "Looking for %s\n",cur));
017f25f1
IZ
3361 if (PerlLIO_stat(cur,&PL_statbuf) >= 0
3362 && !S_ISDIR(PL_statbuf.st_mode)) {
491527d0
GS
3363 dosearch = 0;
3364 scriptname = cur;
3365#ifdef SEARCH_EXTS
3366 break;
3367#endif
3368 }
3369#ifdef SEARCH_EXTS
3370 if (cur == scriptname) {
3371 len = strlen(scriptname);
84486fc6 3372 if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
491527d0 3373 break;
9e4425f7
SH
3374 my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf));
3375 cur = tmpbuf;
491527d0
GS
3376 }
3377 } while (extidx >= 0 && ext[extidx] /* try an extension? */
6fca0082 3378 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len));
491527d0
GS
3379#endif
3380 }
3381#endif
3382
3383 if (dosearch && !strchr(scriptname, '/')
3384#ifdef DOSISH
3385 && !strchr(scriptname, '\\')
3386#endif
cd39f2b6 3387 && (s = PerlEnv_getenv("PATH")))
cd39f2b6 3388 {
491527d0 3389 bool seen_dot = 0;
92f0c265 3390
39a02377
DM
3391 bufend = s + strlen(s);
3392 while (s < bufend) {
7c458fae 3393# ifdef DOSISH
491527d0 3394 for (len = 0; *s
491527d0 3395 && *s != ';'; len++, s++) {
84486fc6
GS
3396 if (len < sizeof tmpbuf)
3397 tmpbuf[len] = *s;
491527d0 3398 }
84486fc6
GS
3399 if (len < sizeof tmpbuf)
3400 tmpbuf[len] = '\0';
7c458fae 3401# else
39a02377 3402 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend,
491527d0
GS
3403 ':',
3404 &len);
7c458fae 3405# endif
39a02377 3406 if (s < bufend)
491527d0 3407 s++;
84486fc6 3408 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
491527d0
GS
3409 continue; /* don't search dir with too-long name */
3410 if (len
7c458fae 3411# ifdef DOSISH
84486fc6
GS
3412 && tmpbuf[len - 1] != '/'
3413 && tmpbuf[len - 1] != '\\'
490a0e98 3414# endif
491527d0 3415 )
84486fc6
GS
3416 tmpbuf[len++] = '/';
3417 if (len == 2 && tmpbuf[0] == '.')
491527d0 3418 seen_dot = 1;
28f0d0ec 3419 (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len);
491527d0
GS
3420#endif /* !VMS */
3421
3422#ifdef SEARCH_EXTS
84486fc6 3423 len = strlen(tmpbuf);
491527d0
GS
3424 if (extidx > 0) /* reset after previous loop */
3425 extidx = 0;
3426 do {
3427#endif
84486fc6 3428 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
3280af22 3429 retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
017f25f1
IZ
3430 if (S_ISDIR(PL_statbuf.st_mode)) {
3431 retval = -1;
3432 }
491527d0
GS
3433#ifdef SEARCH_EXTS
3434 } while ( retval < 0 /* not there */
3435 && extidx>=0 && ext[extidx] /* try an extension? */
6fca0082 3436 && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)
491527d0
GS
3437 );
3438#endif
3439 if (retval < 0)
3440 continue;
3280af22
NIS
3441 if (S_ISREG(PL_statbuf.st_mode)
3442 && cando(S_IRUSR,TRUE,&PL_statbuf)
e37778c2 3443#if !defined(DOSISH)
3280af22 3444 && cando(S_IXUSR,TRUE,&PL_statbuf)
491527d0
GS
3445#endif
3446 )
3447 {
3aed30dc 3448 xfound = tmpbuf; /* bingo! */
491527d0
GS
3449 break;
3450 }
3451 if (!xfailed)
84486fc6 3452 xfailed = savepv(tmpbuf);
491527d0
GS
3453 }
3454#ifndef DOSISH
017f25f1 3455 if (!xfound && !seen_dot && !xfailed &&
a1d180c4 3456 (PerlLIO_stat(scriptname,&PL_statbuf) < 0
017f25f1 3457 || S_ISDIR(PL_statbuf.st_mode)))
491527d0
GS
3458#endif
3459 seen_dot = 1; /* Disable message. */
9ccb31f9
GS
3460 if (!xfound) {
3461 if (flags & 1) { /* do or die? */
6ad282c7 3462 /* diag_listed_as: Can't execute %s */
3aed30dc 3463 Perl_croak(aTHX_ "Can't %s %s%s%s",
9ccb31f9
GS
3464 (xfailed ? "execute" : "find"),
3465 (xfailed ? xfailed : scriptname),
3466 (xfailed ? "" : " on PATH"),
3467 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
3468 }
bd61b366 3469 scriptname = NULL;
9ccb31f9 3470 }
43c5f42d 3471 Safefree(xfailed);
491527d0
GS
3472 scriptname = xfound;
3473 }
bd61b366 3474 return (scriptname ? savepv(scriptname) : NULL);
491527d0
GS
3475}
3476
ba869deb
GS
3477#ifndef PERL_GET_CONTEXT_DEFINED
3478
3479void *
3480Perl_get_context(void)
3481{
27da23d5 3482 dVAR;
3db8f154 3483#if defined(USE_ITHREADS)
ba869deb
GS
3484# ifdef OLD_PTHREADS_API
3485 pthread_addr_t t;
5637ef5b
NC
3486 int error = pthread_getspecific(PL_thr_key, &t)
3487 if (error)
3488 Perl_croak_nocontext("panic: pthread_getspecific, error=%d", error);
ba869deb
GS
3489 return (void*)t;
3490# else
bce813aa 3491# ifdef I_MACH_CTHREADS
8b8b35ab 3492 return (void*)cthread_data(cthread_self());
bce813aa 3493# else
8b8b35ab
JH
3494 return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
3495# endif
c44d3fdb 3496# endif
ba869deb
GS
3497#else
3498 return (void*)NULL;
3499#endif
3500}
3501
3502void
3503Perl_set_context(void *t)
3504{
8772537c 3505 dVAR;
7918f24d 3506 PERL_ARGS_ASSERT_SET_CONTEXT;
3db8f154 3507#if defined(USE_ITHREADS)
c44d3fdb
GS
3508# ifdef I_MACH_CTHREADS
3509 cthread_set_data(cthread_self(), t);
3510# else
5637ef5b
NC
3511 {
3512 const int error = pthread_setspecific(PL_thr_key, t);
3513 if (error)
3514 Perl_croak_nocontext("panic: pthread_setspecific, error=%d", error);
3515 }
c44d3fdb 3516# endif
b464bac0 3517#else
8772537c 3518 PERL_UNUSED_ARG(t);
ba869deb
GS
3519#endif
3520}
3521
3522#endif /* !PERL_GET_CONTEXT_DEFINED */
491527d0 3523
27da23d5 3524#if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE)
22239a37 3525struct perl_vars *
864dbfa3 3526Perl_GetVars(pTHX)
22239a37 3527{
533c011a 3528 return &PL_Vars;
22239a37 3529}
31fb1209
NIS
3530#endif
3531
1cb0ed9b 3532char **
864dbfa3 3533Perl_get_op_names(pTHX)
31fb1209 3534{
96a5add6
AL
3535 PERL_UNUSED_CONTEXT;
3536 return (char **)PL_op_name;
31fb1209
NIS
3537}
3538
1cb0ed9b 3539char **
864dbfa3 3540Perl_get_op_descs(pTHX)
31fb1209 3541{
96a5add6
AL
3542 PERL_UNUSED_CONTEXT;
3543 return (char **)PL_op_desc;
31fb1209 3544}
9e6b2b00 3545
e1ec3a88 3546const char *
864dbfa3 3547Perl_get_no_modify(pTHX)
9e6b2b00 3548{
96a5add6
AL
3549 PERL_UNUSED_CONTEXT;
3550 return PL_no_modify;
9e6b2b00
GS
3551}
3552
3553U32 *
864dbfa3 3554Perl_get_opargs(pTHX)
9e6b2b00 3555{
96a5add6
AL
3556 PERL_UNUSED_CONTEXT;
3557 return (U32 *)PL_opargs;
9e6b2b00 3558}
51aa15f3 3559
0cb96387
GS
3560PPADDR_t*
3561Perl_get_ppaddr(pTHX)
3562{
96a5add6
AL
3563 dVAR;
3564 PERL_UNUSED_CONTEXT;
3565 return (PPADDR_t*)PL_ppaddr;
0cb96387
GS
3566}
3567
a6c40364
GS
3568#ifndef HAS_GETENV_LEN
3569char *
bf4acbe4 3570Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
a6c40364 3571{
8772537c 3572 char * const env_trans = PerlEnv_getenv(env_elem);
96a5add6 3573 PERL_UNUSED_CONTEXT;
7918f24d 3574 PERL_ARGS_ASSERT_GETENV_LEN;
a6c40364
GS
3575 if (env_trans)
3576 *len = strlen(env_trans);
3577 return env_trans;
f675dbe5
CB
3578}
3579#endif
3580
dc9e4912
GS
3581
3582MGVTBL*
864dbfa3 3583Perl_get_vtbl(pTHX_ int vtbl_id)
dc9e4912 3584{
96a5add6 3585 PERL_UNUSED_CONTEXT;
dc9e4912 3586
c7fdacb9
NC
3587 return (vtbl_id < 0 || vtbl_id >= magic_vtable_max)
3588 ? NULL : PL_magic_vtables + vtbl_id;
dc9e4912
GS
3589}
3590
767df6a1 3591I32
864dbfa3 3592Perl_my_fflush_all(pTHX)
767df6a1 3593{
f800e14d 3594#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
ce720889 3595 return PerlIO_flush(NULL);
767df6a1 3596#else
8fbdfb7c 3597# if defined(HAS__FWALK)
f13a2bc0 3598 extern int fflush(FILE *);
74cac757
JH
3599 /* undocumented, unprototyped, but very useful BSDism */
3600 extern void _fwalk(int (*)(FILE *));
8fbdfb7c 3601 _fwalk(&fflush);
74cac757 3602 return 0;
8fa7f367